NFL legend Herschel Walker‘s fledgling Senate bid is a little over a week old and he is already being cast as a political opportunist and damaged goods — and that’s by fellow Republicans. Mr. Walker, a Heisman Trophy winner from the University of Georgia, entered the primary race as an odds-on favorite and quickly hit the buzzsaw from the state’s Republican establishment. The situation is bringing back haunting memories from the 2020 special election where the knock-down, drag-out GOP primary fight between Sen. Kelly Loeffler and Rep. Doug Collins that helped pave the way for Democratic Sen. Raphael Warnock’s rise....