Donald Trump’s installation of loyalists at the Republican National Committee and the subsequent staffer purge served as a trial run for what the former president plans to do next, says GOP strategist and Republican Accountability Project leader Sarah Longwell. Longwell appeared on MSNBC Tuesday night to discuss with host Chris Hayes Trump’s plans for the civil service if reelected to the White House in 2025 one day after a reported RNC “bloodbath” saw 60 officials get the ax. “I always feel like we’ve taken the final step in Trump’s complete takeover of the Republican Party, but there is alwa…