Follow live updates and analysis of Day 4 of the Republican National Convention.

Follow live updates and analysis of Day 3 of the Republican National Convention.

Follow live updates and analysis of Day 2 of the Republican National Convention.

Follow live updates and analysis of the Republican National Convention.

Follow live updates and analysis of the Democratic National Convention.

Joe Biden and Kamala Harris make their first joint appearance Wednesday since he tapped her to be his vice presidential running mate.

Vice President Pence acknowledges that key parts of the country are seeing new infections but said the U.S. has made progress overall and that the task force is working closely with affected states.

Many governors say they need more coronavirus testing. President Trump said his administration would have a call with governors on Monday about increasing capacity.

The president has offered no evidence that the Chinese were responsible for the pandemic, and conceded, "If it was a mistake, a mistake is a mistake."

Trump said he believed the federal government has been working well with most states in the disaster but he griped about complaints reported by some Democratic governors.

Fourteen states are voting in the presidential primary on Tuesday, with 1,357 delegates at stake. Follow the latest updates.

Sen. Bernie Sanders leads the race as he and six other presidential hopefuls take the stage on Tuesday night at 8 p.m. ET. Follow NPR's live coverage of the debate.