Donald Trump’s much-anticipated appeal to Colorado’s decision to bump him from its ballot shocked a legal expert who professed himself stunned by its shoddiness, he said. “The sort of gall that the brief represents, it’s really, I think, shocking,” Andrew Weissmann told Lawrence O’Donnell on MSNBC Wednesday night. “It’s really sort of beyond the pale and legally wrong.” Weissmann, an MSNBC legal analyst and former federal prosecutor, slammed Trump’s attorneys arguments for both their arguments and their organization. POLL: Should Trump be allowed to run for office? “There are some legitimate a…