Things to Watch at the Final Democratic Debate Before Iowa

http://www.nbcnews.com/politics/2016-election/four-things-watch-final-democratic-debate-iowa-n498296
Excerpt:

Sanders on defense

Sanders has yet to release the details of a tax plan he needs to fund his proposed single-payer health care plan, and his campaign has given conflicting answers about when it would come. The Vermont senator has been saying since at least July that it would come "soon," and in recent interviews said he would present it before the Iowa caucuses, but the moderators and Clinton are likely to press him for details.

Sanders worked to remove another piece of baggage the night before the debate, when his campaign announced he would support a bill to revoke the legal immunity granted to gun makers by a 2005 bill for which Sanders voted. Clinton has been hammering her rival for that vote, accusing him of doing the bidding of the National Rifle Association.

Clinton campaign chairman John Podesta suggested in a tweet that Clinton would not give Sanders a pass on what he called a "debate-eve conversion." Expect the words "flip flop" to come up a lot as Clinton tries to paint Sanders as typical politician.

Gun fight

The debate venue, the Gaillard Center for the Performing Arts, is almost directly across the street from the Emanuel AME church where a shooter with neo-Confederate sympathies killed nine black worshipers last June.

Beyond the immunity law, Clinton has plenty of other fodder with which to attack Sanders on guns. That includes the so-called Charleston Loophole, which allowed shooter Dylan Roof to buy a gun, even though a previous legal issue should have prevented him. The Washington Post fact checker confirmedthat Sanders supported that loophole.