WEST PALM BEACH, Fla. — President Trump vented his fury over the Russia probe on Sunday, arguing that the Obama administration bears some of the blame, insisting that he never denied the election meddling and declaring that “they are laughing their asses off in Moscow.” In a rapid-fire series of tweets from his Palm Beach estate, the president unloaded over the Russia investigation, days after an indictment from special counsel Robert Mueller charged 13 Russians with a plot to interfere in the 2016 U.S.