South Carolina GOP Sen. Tim Scott, who is speculated to be one of Donald Trump’s considerations for a running mate, is being warned by allies of Trump to stop pushing opposition research on other potential running mates, such as fellow Republican Elise Stefanik, The Messenger reported. Scott’s team has reportedly been “shopping around” their research on Stefanik, according to sources speaking to The Messenger. “It’s particularly frustrating because we are trying to close down a primary and we have people passing opposition research around about potential VP nominees,” a source allied with Trum…