Herschel Walker, the former football star who has the backing of former President Donald Trump, launched a campaign Tuesday for a U.S. Senate seat in Georgia. Walker will be the most well-known Republican running against Sen. Raphael Warnock (D-Ga.) in next year’s contest. Walker filed paperwork Tuesday with the Federal Election Commission establishing his candidacy and recently registered to vote in Georgia, but he is yet to make a formal announcement or get his campaign website up and running. Trump has publicly encouraged Walker to run for the Senate and predicted that he would enter politics. “He told me he’s going to, and I think he will,” Trump said during a June interview with the “Clay Travis & Buck Sexton Show”. “I had dinner with him a week ago. He’s a great guy. He’s a patriot. He’s a very loyal person,” Trump added. Walker returned the admiration to Trump when he spoke about …