Former Republican operative Tim Miller questioned the authenticity of Sen. J.D. Vance when he attacked a CNN reporter asking about the reported physical altercation at Arlington National Cemetery. Vance pivoted from alleging the story was being blown out of proportion to attacking President Joe Biden’s administration for the abrupt withdrawal from Afghanistan. “Vance told MSNBC he was frustrated when he made those comments. We’ve often talked about message, sticking to a message, and how to deliver a message,” MSNBC host Jose Diaz-Balart said. Want more breaking political news? Click for the l…