Five Democratic presidential hopefuls will take the stage in Las Vegas this evening in their first debate of the 2016 nomination process. Just as with the Republican contenders before their first face-off, there is no shortage of advice for candidates regarding what they need to do and for viewers on what they ought to be looking for. The Washington Post this morning offers nine items to be on the lookout for, a few of which are excerpted below:

9 questions for …