Article courtesy of The Resurgent, written by Erick Erickson.
One of the most notable things about Donald Trump’s endorsements so far is how almost every single one of them is from someone whose career in the Republican Party is at an end. Whether it is Huckabee or Gingrich, regularly introduced on TV as “former” this and that (and still unwilling to claim formal endorsements even though they are on the team), or Chris Christie, Sarah Palin, Jan Brewer, Rick Scott, Scott Brown, etc., etc., etc. — these are all people whose advancement in the party has come to an end.
The other notable thing is that, like the examples of Huckabee and Gingrich, along with a number of others on TV and radio, many ardent, prominent Trump supporters cannot bring themselves to actually say, even at this point, that they are actually fully Trump supporters. This all weighs on a problem for Trump: picking a Vice President.