Senate Majority Leader John Thune said Monday he would hold off on advancing a closely watched package of sanctions targeting Russia’s trading partners after President Donald Trump said he was prepared to act himself later this summer if Russian President Vladimir Putin doesn’t move toward a peace deal with Ukraine. “It sounds like right now the president is going to attempt to do some of this on his own,” Thune told reporters. “If at some point the president concludes that it makes sense and adds value and leverage that he needs in those negotiations to move the bill, then we’ll...