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Marthe48

(16,962 posts)
Fri Sep 2, 2016, 05:36 PM Sep 2016

On 538 why are HRC's odds going down?

I check 538 often because Nate Silver was successful predicting elections in previous years. But the last week, Hillary's odds are going down and Trump's are increasing, even though no states on the 538 map have changed from blue to red or vice versa since last week.
I don't understand why the odds are changing when the map isn't changing? And Johnson's odds are stable? Does it have anything to do with the minimal coverage HRC is getting from MSM?

Can anyone help me understand? Thanks!

29 replies = new reply since forum marked as read
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On 538 why are HRC's odds going down? (Original Post) Marthe48 Sep 2016 OP
Depends on which one you're looking at... Wounded Bear Sep 2016 #1
What was the total change? JoePhilly Sep 2016 #2
I think it's because the Nationals are narrowing SticksnStones Sep 2016 #3
The sky falls occasionally, then we get some glue MyNameGoesHere Sep 2016 #4
I have noticed the same, the polls have been gradually tightening the doc03 Sep 2016 #5
Because all Trump does is attack ChairmanAgnostic Sep 2016 #6
The odds on the big forecast page change as the odds for the individual state races change. mn9driver Sep 2016 #7
The media is fixating on Hillary's baggage while ignoring Trump's. jalan48 Sep 2016 #8
This! Hillary talks about policy and how she will achieve her goals and Arkansas Granny Sep 2016 #10
The race is tightening according to polls. Buckeye_Democrat Sep 2016 #9
Wasn't there a national poll that showed the race tied today? TheHound Sep 2016 #11
You really think Trump will ever give a concession speech? Peigan68 Sep 2016 #20
I don't know if he would TheHound Sep 2016 #21
Because Skoods Sep 2016 #12
Also Skoods Sep 2016 #13
The race is tightening - and the answer to your question is somewhat complicated CajunBlazer Sep 2016 #14
The polls are tightening and 538 is very sensitive to poll changes WillyBrandt Sep 2016 #15
There is nothing to understand Loki Liesmith Sep 2016 #16
If it helps calm you any, as of yesterday, Hillary was leading in all 8 Battleground states. politicaljunkie41910 Sep 2016 #17
I'm concerned about the concerning nature of your concern. RBInMaine Sep 2016 #18
You are correct. old guy Sep 2016 #22
We contributed to Hillary and Strickland Marthe48 Sep 2016 #25
According to one poll HRC is winning in NEBRASKA NHDEMFORLIFE Sep 2016 #19
The polls are tightening and what they seem to be showing Imperialism Inc. Sep 2016 #23
Here is a consumer's guide to election year polls ehrnst Sep 2016 #24
I don't know which show it was or who on the panel said it but it was brought up that the Upthevibe Sep 2016 #26
Thanks for the helpful replies Marthe48 Sep 2016 #27
I don't know. . . daligirrl Sep 2016 #28
I saw that too-- decided I'd check another day ailsagirl Sep 2016 #29

Wounded Bear

(58,656 posts)
1. Depends on which one you're looking at...
Fri Sep 2, 2016, 05:40 PM
Sep 2016

one of his odds charts includes some intangibles like economic and political events, not just voter polls.

JoePhilly

(27,787 posts)
2. What was the total change?
Fri Sep 2, 2016, 05:41 PM
Sep 2016

The media loves to claim that any small downward fluxuation for Hillary is a FALL and any upward tick is not news worthy.

So the question really is, "What does the trend line look like?"

And its basically flat.

doc03

(35,338 posts)
5. I have noticed the same, the polls have been gradually tightening the
Fri Sep 2, 2016, 05:44 PM
Sep 2016

last couple weeks. If you scroll down you will see a chart with Trump going up and Hillary going down, I hope this is normal.

mn9driver

(4,425 posts)
7. The odds on the big forecast page change as the odds for the individual state races change.
Fri Sep 2, 2016, 05:46 PM
Sep 2016

He explains it further down that page. Each state race has a probability of a Clinton or Trump win based on polling. All the charts further down support the big numbers at the top. It's pretty neat.

jalan48

(13,866 posts)
8. The media is fixating on Hillary's baggage while ignoring Trump's.
Fri Sep 2, 2016, 05:51 PM
Sep 2016

There is virtually no discussion of issues, it's all cult of personality.

Arkansas Granny

(31,517 posts)
10. This! Hillary talks about policy and how she will achieve her goals and
Fri Sep 2, 2016, 05:56 PM
Sep 2016

the media ignores her. Trump talks about that fucking wall and they fall all over themselves to broadcast it far and wide.

Buckeye_Democrat

(14,854 posts)
9. The race is tightening according to polls.
Fri Sep 2, 2016, 05:53 PM
Sep 2016

One explanation is that Hillary's post-convention "bounce" is now over.

I'm personally amazed that the race is even remotely close.

Some people must really hate Hillary after the YEARS of conservative propaganda, baseless accusations that the Clintons murder people, etc.

 

TheHound

(17 posts)
11. Wasn't there a national poll that showed the race tied today?
Fri Sep 2, 2016, 05:57 PM
Sep 2016

Seems that the polls this past week are showing a closer race, with Hillary still in the lead. Looking forward to Hillary taking 300+ electoral votes, and Trump's sad concession speech.

 

TheHound

(17 posts)
21. I don't know if he would
Fri Sep 2, 2016, 06:54 PM
Sep 2016

But I'd love to see it. I've seen a lot of politicians I don't like (Reagan, Bush, Cruz, Helms (especially Helms), etc.), but Trump is right up there with the worst. If you've haven't seen the movie V for Vendetta you should watch it, because Trump reminds me of High Chancellor Adam Sutler.

 

Skoods

(341 posts)
12. Because
Fri Sep 2, 2016, 05:58 PM
Sep 2016

It's September 2.

Wait until the debates, when trump looks like a child next to Clinton. It's going to be a sight to see.

 

Skoods

(341 posts)
13. Also
Fri Sep 2, 2016, 05:59 PM
Sep 2016

i love how the media spins that trump is narrowing the deficit when he picks up a Point or two in a poll. They completely disregard the MoE and the fact that it's entirely plausible that the margins haven't changed at all, it's just a statistical anomaly.

CajunBlazer

(5,648 posts)
14. The race is tightening - and the answer to your question is somewhat complicated
Fri Sep 2, 2016, 06:01 PM
Sep 2016

Last edited Fri Sep 2, 2016, 06:45 PM - Edit history (1)

Nate Silver does his projections on a state by state basis. You can see this methodology played out by clicking on individual states on his main national prediction page. Especially look at the swing states he lists on that page. For each state he calculates for each candidate the probability that that candidate will win the state based on the latest polls. (For instance in Florida those probabilities of winning are 64.3% for Clinton and 35.6% for Trump as I write this and for Ohio they are 62.6% for Hilary and 37.3% for Trump.)

To calculate the probability each candidate has of winning a particular state, he first adjusts each poll for known biases and then combines all of the state's recent polls on a weighted basis - the better the poll and the more recently it is taken, the higher the weight it is given.

Once he has calculated the probabilities each candidate has of winning each state, he has the computer run randomly through the 10,000 hypothetical election results for all of the states. For instance in those runs Clinton would win Florida 64.3% of the of the time and Ohio 62.6% of those 10,000 runs. The results of those runs in various combinations are the probabilities that Clinton and Trump have of winning the electoral college vote.

As the polls tighten in the individual states, especially in the swing states, the probabilities of Hillary winning those states go down so her chances of winning the national election also go down, even if maintains a lead in all those states.

The bottom line (and this is important if you haven't been able to grasp the above due to my poor explanation) is although Hillary has maintained a lead in the polls in the swing states, her leads in those states are not as big as they used to be. Therefore her chances of winning those states has gone down, although they still remain above 50%. As her chances of winning key states went down, her chances of winning the electoral college went down as well.

Examples: Hillary chances of winning Florida have dropped from 79.9% on August 14th to 64.3% today. In Ohio her chances of winning dropped from 79.8% on August 14th to 62.6% today. This reflects the fact that since August 14th Hillary's adjusted poll lead in Florida has dropped from 7.3% to 2.6% while at the same time her lead in Ohio has dropped form 6.2% to 2.4%. (She is still winning in those states, but by not as much.)

The same thing is happening to a greater or lesser extent in other states. When all of these state statistics are combined for the 10,000 computer runs which generate the statistics for the electoral college, it isn't at all surprising that Hillary's chances of winning the Presidency have dropped from 89.2% on August 14th to 72.1% today. A good question would be, why haven't her chances fallen further? Answer: Remember that Hillary only needs to win a few of the swing states to win the election.

WillyBrandt

(3,892 posts)
15. The polls are tightening and 538 is very sensitive to poll changes
Fri Sep 2, 2016, 06:01 PM
Sep 2016

You'll see NYT or the Princeton predictors moving rather less

Our lead is good but smaller given the best data we have

Stepping back, it's not surprising that the huge post convention bounce we got is narrower. I wish it were otherwise. Trump won't lose without a (clumsy, racist, idiotic) fight

Loki Liesmith

(4,602 posts)
16. There is nothing to understand
Fri Sep 2, 2016, 06:02 PM
Sep 2016

She has had a batch of closer polls lately.

Expect it to to get even closer because the word "emails" was in the news.

It will revert to the baseline state of the race which is a mid range Clinton lead.

Trump will never be ahead in any poll averages for more than a couple of days.

politicaljunkie41910

(3,335 posts)
17. If it helps calm you any, as of yesterday, Hillary was leading in all 8 Battleground states.
Fri Sep 2, 2016, 06:03 PM
Sep 2016

This was on Anderson Coopers 5:00 show. Her margins of victory were higher than they were as of Aug 4. It certainly calmed my concerns to hear that because she has had to deal with a lot of incoming BS in the past couple of weeks. My guess is that you should not be concerned for now. Of course, there is always another round of mortars being fired across the bough, in her direction. But for now, I'm feeling good knowing that she is leading Trump in all 8 of the Battleground states.

 

RBInMaine

(13,570 posts)
18. I'm concerned about the concerning nature of your concern.
Fri Sep 2, 2016, 06:07 PM
Sep 2016

Quit being concerned. Trump will lose. Yes, campaign hard. Don't take it for granted. But he will be smashed hard on election day. Don't be concerned about polls. Donate. Phonebank. Canvass. And win.

Marthe48

(16,962 posts)
25. We contributed to Hillary and Strickland
Fri Sep 2, 2016, 07:38 PM
Sep 2016

My husband is ill, not sure we can do more than give money this time around. But we will vote early and encourage others to GOTV.

Imperialism Inc.

(2,495 posts)
23. The polls are tightening and what they seem to be showing
Fri Sep 2, 2016, 07:26 PM
Sep 2016

is that Trump has made very small gains but Hillary has lost support.

If the polls were going to tighten that would be the best way for them to do so (for us). Trump isn't bringing in new support which might suggest he's already near his ceiling. Hopefully after the first debate people will start embracing Clinton more, once they see she is not the unlikable monster the press portrays her as.

Upthevibe

(8,051 posts)
26. I don't know which show it was or who on the panel said it but it was brought up that the
Fri Sep 2, 2016, 08:01 PM
Sep 2016

talk shows need to make this look like a horse race (in so many words). As we all know, the media is run by sociopaths (by definition: the disorder is characterized by a disregard for the feelings of others, a lack of remorse or shame, manipulative behavior, the ability to lie in order to achieve goals). The documentary "The Corporation" shows big business for what it is. Having said that, if nothing else, I think people will have the crap scared out of them and vote! When we look at the polls state by state, Hillary's ahead in almost all of the swing states. The bottom line is revenue generated for these news stations.

daligirrl

(620 posts)
28. I don't know. . .
Fri Sep 2, 2016, 10:35 PM
Sep 2016

I think the enthusiasm of minorities this election is way underrated. I am black, and I know how determined people are to keep trump out of office. I also know a lot of the Hispanic community. They are motivated as well. The fact that the MSM wastes time and energy speculating on whether Trump can pick up minority votes is ludicrous. I believe in my heart that we are being gaslighted. I believe this still with the underlying fear that I could be wrong, but I cannot shake my optimism about this election.

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