JUDY WOODRUFF:

For Republicans, the countdown to their national convention in Cleveland is on, with a major focus on who will be the vice presidential choice.

The party's nominee-to-be spent this day working to answer that question.

Donald Trump and Indiana Governor Mike Pence, after meeting this morning in Indianapolis. Pence also appeared with Trump last night at a rally.

GOV. MIKE PENCE (R), Indiana: We are ready to put a fighter, a builder, and a patriot in the Oval Office of the United States of America. We're ready for Donald Trump to be our next president.

(CHEERING AND APPLAUSE)