Biden and Harris sign documents to receive Democratic nomination

• The documents confirm that they are seeking the offices of president and vice president — and that they're qualified to do so and accept being placed on the ballot.
• They're a required step to appear on ballots nationwide.
• "I’m signing this because I’m in this race to win with that guy right there," Harris said, pointing to Biden — next to her at the Hotel Du Pont in Wilmington, Del.

The big picture: Biden and Harris have already gotten to work during their first days together as the Democratic ticket. On Thursday, they attended a joint coronavirus briefing and economic briefing with two groups of experts.

Go deeper: Biden and Harris start joint coronavirus briefings.