George Conway believes that an authoritarian MAGA mentality existed in the Republican Party before Donald Trump — and some of the clues lie with Sarah Palin. During Wednesday’s “Mehdi Unfiltered” podcast, Conway, a former Republican and The Lincoln Project co-founder, discussed with host Mehdi Hasan the through-line from Palin to Trump and the MAGA signs that existed back when she was tapped to be John McCain’s vice presidential running mate in …