REID WILSON:

Yes, although Susan brings up an important point here.

There are a few things — sure, he will fire back at anybody over anything, but there are few things that really bug him. Elizabeth Warren's criticism is one. Questions about Trump University have been another. Questions about his net worth, especially, tend to get under his skin.

I think Republicans never figured out how to effectively go after Trump and undercut him with his core supporters. You know, Democrats only get one shot. They don't get a whole bunch of primaries. They only get the one shot in November. So they need to sort of start experimenting, figuring out the right way to undercut his support among as many of his core voters as they can, raise his unfavorable ratings, make him unpalatable to swing voters, and finally to get under his skin and make him look unpresidential.