The anti-immigrant and Pat Buchanan-wing of the Paul support group is with Donald Trump and to a smaller extent Ted Cruz, the young college/high school male support is bleeding to Bernie Sanders, and the more religious Paul supporters are now with Ben Carson and Ted Cruz.
I don't believe that Ron Paul's supporters are all "anti-immigrant" and I would say that it is unlikely that young libertarian professionals who support free markets and backed Paul in 2008 and 2012 are giving to vote for someone who believes in government-intervention into the market and someone without bold policies.
My guess is that most of Paul's 2008 supporters are either backing Rand Paul, Ted Cruz, or are waiting to support Gary Johnson as the nominee of the Libertarian Party.
