By Joseph Ax (Reuters) -In a test of his enduring influence over the Republican Party, former President Donald Trump returned to Georgia on Saturday to stump for allies who support his ongoing false claims that the 2020 election was stolen from him – starting with Georgia. At a rally in Commerce, a small city northeast of Atlanta, Trump spent the first 20 minutes of his speech repeating falsehoods about the outcome, calling Governor Brian Kemp, a fellow Republican, a “turncoat” and “coward” for failing to reverse the results. Trump has invested significant political capital in the state, endor…