A series of polls released this week show Robert F. Kennedy Jr.’s quixotic candidacy might attract more Republican-leaning voters in 2024 than Democrats. That may have been what prompted former President Donald Trump to release a three-post screed attacking him. On Friday night, The 45th president of the United States set his sights on RFK Jr., insisting to his millions of followers that the independent presidential candidate was actually a “Radical Left Liberal” who was secretly working to help President Joe Biden’s reelection campaign. He even attempted to assign Kennedy one of his patented …