Kayla Epstein
US reporter

We're still waiting on the White House briefing, so let's take a moment to talk about the running mates for the presidential election.

Much of the focus this week has been on the current vice president, Kamala Harris.

But anticipation is mounting around who Donald Trump might pick as his own vice presidential running mate. He could make an announcement between now and the Republican National Convention next week.

Trump will hold a rally at his golf club in Doral, Florida tonight, and one rumoured contender, Senator Marco Rubio, will reportedly be there. Trump has another rally scheduled later this week in Pennsylvania.

The former president has reportedly narrowed his list of contenders to a handful of names, including North Dakota Governor Doug Burgum, who ran in the 2024 Republican primary, and Ohio Senator JD Vance, a rising star on the right.

While we wait for the White House briefing, let's check in with our colleagues at Ukrainecast.

They have been discussing whether the Nato alliance can survive a Trump presidency, how big a week it is for Joe Biden, as well as Ukraine's chances of joining the bloc.

In the latest episode, Victoria Derbyshire and Vitaly Shevchenko speak to former US Ambassador to NATO, Kurt Volker, about what to expect from the 75th NATO anniversary summit.

You can listen to Ukrainecast here.

We're currently waiting for the White House briefing to begin.

It was scheduled to start at 13:00 local time (18:00 BST).

However, it is not unusual to have a late start.

And a reminder, you can watch it live at the top of this page.

The White House daily briefing is scheduled to start soon, with Press Secretary Karine Jean-Pierre to face the media.

These briefings have been fiery ever since Joe Biden and Donald Trump's presidential debate.

On Monday, a tense and combative briefing lasted more than an hour.

As a storm cloud hangs over Biden's re-election campaign, we can expect more of the same today.

You will be able to watch it live at the top of this page.

Anthony Zurcher
BBC North America correspondent

It is understood that many European leaders are anxious about Donald Trump and his foreign policy strategy. The former president has disparaged multilateral international alliances.

Kristine Berzina, managing director of the German Marshall Fund Geostrategy North, said that in the past two weeks, however, these leaders have been experiencing something new - Biden anxiety.

After his halting debate performance, she says, American allies have begun doubting whether the president is up to the task.

Heading into this week's Nato summit, they are hoping to see some evidence that his performance that night was an aberration and not reflective of a new normal.

“It is worrisome to have a close ally, your most meaningful ally, falter,” said Berzina.

“So I think there is tremendous hope that Biden passes the test. But if he isn’t able to deliver, it creates more questions about the US’s reliability.”

Rachel Looker
Reporting from Capitol Hill

House Democrats leaving today's almost two-hour meeting had mixed reactions.

Most refused to comment to reporters.

New York congresswoman Yvette Clarke of New York gave a thumbs up. Another lawmaker described it as a “good meeting” with “good conversation”.

Colorado congresswoman Diana DeGette said there was “no fighting” among the party.

“Staying with papa,” Adriano Espaillat, deputy chair of the Congressional Hispanic Caucus, told reporters when asked if he still plans to support Biden. The caucus released a statement yesterday indicating support for Biden’s re-election.

But some seemed less convinced.

“I made my case for Biden and for a replacement,” Texas congressman Lloyd Doggett, the first sitting House Democrat who called for Biden to resign, told reporters.

He said while Biden has worked to convince the party he’s been a great president, too many in battleground states remain unconvinced.

“I’m going to support the nominee of our party. I certainly support President Biden but I think we would be less endangered of a Trump presidency if we had a different candidate,” he said.

Nato could be make-or-break for Bidenpublished at 16:41 British Summer Time 9 July

16:41 BST 9 July

Anthony Zurcher
BBC North America correspondent

Twelve days after a halting debate performance that may go down as one of the most damaging in modern American history, the president is fighting for his political survival under intense domestic and global scrutiny.

This week’s Nato summit in Washington DC may be his path to at least a temporary reprieve - or this president’s last stand.

Biden will host alliance leaders for three days of meetings and public events culminating in a solo press conference on Thursday afternoon.

It is a stage on which Biden, a man well versed in foreign relations, should be comfortable. But it also raises the already high stakes for his presidency, given that a poor showing will have international as well as domestic ramifications.

A mistake could start a political stampede among Democrats that extinguishes his hopes of even making it to the November general election, let alone winning it.

Rachel Looker
Reporting from Capitol Hill

Hello from a sunny, humid and swamp-like Capitol Hill.

This is the second day lawmakers have been back at the Capitol since President Joe Biden’s debate with Donald Trump - which caused some Democratic party members to call for Biden to withdraw from the election.

The party is still trying to find a consensus on what the next moves might be.

The caucus met this morning at Democratic National Committee headquarters for what one lawmaker described as “a listening session”.

Most were quiet as they exited the meeting and didn’t talk to reporters – others were on silent phone calls.

Some reiterated their support for the president.

We are expecting to hear from the caucus leaders later today.

Kayla Epstein
US reporter

Republican leaders have been holding a press conference.

House Speaker Mike Johnson took some questions about President Biden, and the Republican used the opportunity to go on the attack.

The debate showed that Biden is “not up to the task,” he says.

“I think the 25th Amendment is appropriate here,” he said, referring to a provision in the US Constitution that dictates how a sitting president could be replaced.

The amendment states that the vice president takes over should a president die or resign while in office.

But it also allows for a president's cabinet to replace him with the vice president if he is unable to perform his or her duties.

Biden has continually maintained that he will not halt his re-election campaign or step down from the presidency.

Kayla Epstein
US reporter

Democrats in the US House of Representatives have been huddling behind closed doors today. The leader of their party, and whether to continue to support his re-election bid, is likely a top agenda item.

It's been a volatile few days on Capitol Hill, with at least nine members of Congress publicly calling on Biden to step aside and let a younger candidate take on Donald Trump in the presidential election.

But after an all-out blitz by the Biden campaign, the rate of public defection has slowed, with stalwart members of the caucus like Rep. Maxine Waters of California throwing her support behind the president.

We'll see what lawmakers are thinking later today.

Brandon Livesay
US reporter

Hello and welcome to our live coverage of US politics on what is set to be a very busy day.

US President Joe Biden continues to face pressure in his bid for re-election after a widely-panned debate performance against Donald Trump.

House Democrats are meeting behind closed doors today and their leader will likely be a major discussion point.

Later, Biden will speak to open the Nato summit in Washington DC. World leaders have begun arriving for the 75th anniversary of the alliance.

And tonight, Donald Trump will hold a rally in Florida.

There's going to be a whole lot more news in between those major moments, so stick with us.