 CBS News Brief. Republicans are fired up as their presidential nominee, Donald Trump, and his running mate, Senator J.D. Vance, hold a campaign rally in Michigan in a few hours. CBS's Caitlin Huey Burns. With the party now united behind them, Trump and Vance are campaigning together for the first time as a presidential ticket in the key battleground state of Michigan, a sign they see the Midwest as their path to victory.