 That's meant to be a demonstration of party unity, but some of Haley's stances on foreign policy and national security differ dramatically from the views of the GOP ticket. VP nominee J.D. Vance is one of the fiercest opponents of U.S. aid for Ukraine in the Senate. Security is tight here following Saturday's attempted assassination of Donald Trump. The former president made his first public appearance last night since that rally, sharing the stage with his new running mate, J.D. Vance.