 Meantime, former President Trump teasing Florida Senator Marco Rubio as his potential running mate. Rubio addressed the crowd at Trump's rally in Florida yesterday, with Trump making multiple references to Rubio throughout the speech. Rubio, Ohio Senator J.D. Vance, and North Dakota Governor Doug Burgum appear to be the three favorites to be the pick of Trump, who many believe will announce the choice at the Republican National Convention next week.