Appearing on CNN Wednesday to discuss the selection of Gov. Tim Walz as the Democratic vice presidential nominee, one of his Republican Party predecessors in Minnesota’s governor’s office ended the interview trying to put a positive spin on Ohio Republican Sen. J. D. Vance’s bumbling entry into the race. But before he got to that point, Tim Pawlenty laughed when CNN’s John Berman mentioned Donald Trump’s roll-out efforts when Vance was introduced to the nation. After pointing out the celebratory nature at a Philadelphia rally Wednesday where Walz first spoke as the presumptive nominee, Berman …