We are winding down our live page now but you can follow further developments in our main news story.

Today was jam-packed with public impeachment hearings.

Tomorrow will be no different.

In the morning, lawmakers will hear from Gordon Sondland, the US ambassador to the European Union.

The Trump loyalist is expected to be this week's biggest witness.

Tomorrow afternoon, Laura Cooper, the deputy assistant secretary of defense, and the undersecretary of state for political affairs David Hale will testify together before Congress.

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Morrison is asked by the Democratic counsel about the July call. He earlier testified that the call was not what he'd hoped to hear.

He clarifies that he had hoped for "a more full-throated statement of support from the President concerning President Zelensky's reform agenda".

Republican Devin Nunes commented that TV ratings are down for today's events, which indicates that the American public are "not buying" the "drug deal" the Democrats are cooking up.

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BBC Americas Bureaux Editor Paul Danahar, who is attending the hearing, says there are warning signs in Kurt Volker's testimony for Wednesday's chief witness, Gordon Sondland.

The US ambassador to the EU is due to appear tomorrow and he is central to Democratic hopes of pinning the pressure campaign on Ukraine directly to President Trump.

Welch, West Virginia, is in a county where US President Donald Trump received more than 70% of the vote in the 2016 election.

The BBC spoke to locals about the ongoing impeachment inquiry into Trump.

Rudy Giuliani is a key player in the Ukraine matter, and particularly in Volker's ongoing testimony

The text messages shared by Volker were some of the first evidence we saw from the impeachment inquiry.

They documented the Trump administration's efforts to get the Ukrainian government to investigate a Ukrainian company with ties to Joe Biden's son and conspiracy theories around Russian hacking during the 2016 US presidential election.

Democrats in the US House of Representatives - which is conducting an impeachment investigation of Donald Trump - made public a selection of these messages.

The BBC's North America reporter Anthony Zurcher examined just how damaging those texts were to Trump.

Image source, ANDREW CABALLERO-REYNOLDS/AFP via Getty Images

Volker says during his one in-person meeting with Giuliani on 19 July, he rejected the "conspiracy theory" raised by Giuliani that Biden "had been influenced in his duties as vice-president by money paid to his son".

Volker calls Biden an honourable man and says he holds him in the highest regard.

"I did not know that President Trump or others had raised Vice-President Biden with the Ukrainians, or had conflated the investigation of possible Ukrainian corruption, with an investigation of the former vice-president.

"In retrospect, for the Ukrainians, it clearly would have been confusing."

Anthony Zurcher
BBC North America reporter

On day three of public hearings in the impeachment inquiry, the witnesses were top aides who listened in on President Trump's call with Ukraine's leader. What did we learn?

One was a decorated Iraq War veteran who was born in Ukraine and came to the US as a child, Lt Col Alexander Vindman.

The other was US Vice-President Mike Pence's top adviser on Russia, Jennifer Williams.

With the TV cameras rolling on Capitol Hill, they repeated concerns they had aired behind closed doors about the July phone call between the two leaders.

But much of Tuesday's hearing was spent talking about a person who was probably not even in the room - the whistleblower.

Read Anthony's full analysis here.

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Volker testifies that Giuliani told him that he "stressed the importance" of Ukraine conducting investigations into what happened in the past - "both the accusations about Vice-President Biden, and about interference in the 2016 election".

Volker says he told Giuliani that it did not seem "at all credible" that Biden had been influenced by personal motives while serving as Vice-President.

BBC Americas Bureaux Editor Paul Danahar, who is in the hearing room, writes that Volker joins a long list of witnesses who have been hostile to what Giuliani was doing.

It's only the fourth time in US history that an American president has faced the peril of being forced from the White House.

Trump is accused of withholding nearly $400m (£327m) in military aid in order to pressurise Ukraine's new president into launching an inquiry into his 2020 Democratic rival Joe Biden and his son. But the US president denies doing anything wrong.

This is a complicated story. We've got you covered with this simple guide to the sequence of events.

Image source, Alamy

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Volker says he and other officials urged Trump to invite Zelensky to the White House, as Zelensky was "the best chance for getting Ukraine out of the mire of corruption".

"The president was very sceptical," Volker says.

"Given Ukraine’s history of corruption, that is understandable. He said that Ukraine was a corrupt country, full of terrible people. He said they 'tried to take me down.' In the course of that conversation, he referenced conversations with Mayor Giuliani.

"It was clear to me that despite the positive news and recommendations being conveyed by this official delegation about the new president, President Trump had a deeply rooted negative view on Ukraine rooted in the past. He was clearly receiving other information from other sources, including Mayor Giuliani, that was more negative, causing him to retain this negative view."

Image source, Drew Angerer/Getty Images

Volker says as the most senior official working on Ukraine portfolio, he knew it was his role to provide leadership.

"That was my perspective when I learned in May 2019 that we had a significant problem that was impeding our ability to strengthen our support for Ukraine’s new president in his effort to ramp up Ukraine’s fight against corruption and implementation of needed reforms."

That problem involved Rudy Giuliani, the president's personal lawyer.

"Despite the unanimous, positive assessment and recommendations of those of us who were part of the US Presidential Delegation that attended the inauguration of President Zelensky, President Trump was receiving a different, negative narrative about Ukraine and President Zelensky....fuelled by accusations from Ukraine’s then-Prosecutor General and conveyed to the President by former Mayor Rudy Giuliani."

Image source, Drew Angerer/Getty Images

Kurt Volker says he was never "aware of or knowingly took part in an effort to urge Ukraine to investigate former Vice President Biden".

He says he was not present on the July phone call between Trump and Zelensky and did not know of any reference made to the Bidens by the president in that call until the transcript was released in September.

Morrison makes it clear he won't speculate on who the whistleblower is.

He says he respects the others who testified, even if their "recollections may differ".

Morrison - who resigned from his position some weeks ago - says he felt no pressure to quit and feared no retaliation.

Image source, Chip Somodevilla/Getty Images

The two big names you need to know - Democratic Chairman Adam Schiff and Republican Devin Nunes.

It's a complicated story. Here are your handy primers for all things impeachment.

SIMPLE GUIDE :If you want a basic take on what's going on, this one's for you

GO DEEPER: Here's a 100, 300 and 800-word summary of the story

WHAT'S IMPEACHMENT? It's a political process to remove a president - video guide

VIEW FROM TRUMP COUNTRY: Hear from residents in Pennsylvania

FACT-CHECK: Is the whistleblower linked to Democrats?

CONTEXT: Why Ukraine matters to the US

Lawmakers are back from voting and the hearings continue. We'll hear from Ambassador Kurt Volker and former National Security Council adviser Tim Morrison.

Image source, Getty Images

As we wait for the afternoon session to start, let's take a look at a central figure in this saga.

On the now infamous 25 July call, Trump asked Ukraine’s leader to co-ordinate with his personal lawyer Giuliani on any inquiry into the Bidens.

The former New York City mayor has already admitted to pushing Ukrainian officials to investigate unsubstantiated corruption allegations against Joe Biden.

He was to travel to Ukraine in May, but eventually decided against it. Earlier this year, two of his associates who helped connect Giuliani with Ukrainian officials were arrested on unrelated campaign finance charges.

Giuliani has also been accused of trying to discredit former Ukraine ambassador Marie Yovanovitch, who gave compelling testimony on Friday, while running his shadow foreign policy in Ukraine.

He has been subpoenaed for documents by impeachment investigators, though he’s previously said he won’t co-operate with Democrats.

As the first of today's hearings concluded Trump's re-election campaign sent out a fundraising email with the title "our latest product".

"The American People aren’t buying this baseless impeachment BS any more. In fact, we don’t think anyone ever really was," the email reads, while advertising bumper stickers in the shape of a traffic sign."It’s always been one big COUP to try and get President Trump OFF the 2020 Ballot. It’s pathetic really."

Image source, Trump Make America Great Again Committee