WHITE SULPHUR SPRINGS, W.Va. — President Trump tried to fire up congressional Republicans at the Greenbrier resort here Thursday, using a lunchtime speech at the GOP’s annual policy retreat to tout their accomplishments in 2017 and spur them to action in what could be a tough election year. “Working together, we’ve accomplished extraordinary things for the American over the last year, and I really believe this is just the beginning,” the president said. “You folks have done well,” he told Republican leaders gathered onstage. “We’re now in battle together.”