 And Pierce Franco-Ordonez reporting. And Trump's choice of a running mate will be in the spotlight tonight. Ohio Senator J.D. Vance is to speak at the convention. And Pierce, Giles Snyder has more. Senator Vance will accept the vice presidential nomination on the night that the convention is expected to focus on national security and foreign policy. Vance is a first-term senator who won his seat in 2022 with Trump's endorsement. But he didn't always see eye to eye with Trump. Once a fierce critic, he is now one of Trump's most vocal supporters.