In 2009, Trump published a book with a very Trumpian title: Think Like a Champion. In that book, he praised Obamas amazing and phenomenal accomplishments. Barack Obama proved that determination combined with opportunity and intelligence can make things happen and in an exceptional way, Trump gushed.
I'm predicting this will be the straw that breaks teh camel's back - I think many trump fans are going to look at Trump's praise of Obamas amazing and phenomenal accomplishments, and will move back to a Mitt or someone else. At this point, Trump is a lib, outright.