People claiming that Trump will beat Hillary are missing something important:

Endorsements. Right now, a number of very important people are withholding endorsements, since the Democratic nomination is still being contested. That's going to end pretty darned soon, actually. Right after the June 7 and June 14 primaries, it will be clear who the nominee of the party will be. In reality, it seems pretty clear right now, but people still have hope for Bernie Sanders, so it's still being contested.

When the Democratic nominee is clear, and it will almost certainly be Hillary Clinton, a phenomenon will occur that hasn't yet happened. President Obama will endorse and begin actively campaigning for the nominee. He's a popular President, just in case nobody's noticed. Others, too, will endorse the actual nominee, including Elizabeth Warren, and their endorsements will be heard by many who are currently supporting the person who will almost certainly not be the nominee.

Then, a bit later, at the end of July, another person will endorse Hillary Clinton as the actual nominee. That person will be Bernie Sanders. He has clearly said as much multiple times.

Those endorsements, and many, many others will be made plain and many beloved Democrats will be campaigning for Hillary Clinton during the general election campaign.

While there will no doubt be some who will still not be convinced to vote for Hillary, they will represent only a small portion of Democratic voters. Some may not even be inclined to vote for any Democrat in the first place.

Meanwhile, Donald Trump will struggle for endorsements from powerful Republicans. Some may say they support the nominee, but will not actually speak Trump's name. There have already been several such lame endorsements, and there will be more to come. We may even have some major moderate Republicans endorse Hillary Clinton, actually.

Anyone who says that Hillary Clinton can't win against Donald Trump is missing a pile of evidence to the contrary. They're mistaken. It's too bad, and that will become clear soon enough.