Meanwhile, Republican presidential front-runner Donald Trump met in Washington, D.C., with leaders of the Republican National Committee amid increasing tension between the GOP leadership and the party’s leading candidate. Trump is facing a wave of backlash in Wisconsin ahead of the Tuesday contest, with recent polls showing his rival, Texas Senator Ted Cruz, leading Trump by at least 10 points. This comes as Trump picked up an endorsement Wednesday from the National Border Patrol Council. It was the Border Patrol agents’ union’s first-ever presidential primary endorsement. Donald Trump has promised to build a wall across the entire length of the U.S.-Mexico border and to force Mexico to pay for it—a proposal which experts have said is not feasible.