Democrats in the US House of Representatives are meeting behind closed doors to prepare for what could be the final week of their months-old impeachment inquiry that is threatening Donald Trump's presidency.
The House Judiciary Committee's Democratic lawmakers are working through the weekend to sift through evidence against the Republican president and draft formal charges, known as articles of impeachment, that the panel could recommend for a full House vote as early as Thursday.
The lawmakers released a 55-page report on Saturday morning outlining what they see as the constitutional grounds on which articles of impeachment could be built.
In releasing the report, the panel's Democratic chairman, Jerrold Nadler, said impeachment was the only way to hold the Republican president to account.
"President Trump abused his power, betrayed our national security, and corrupted our elections, all for personal gain," Nadler said in a statement. "The Constitution details only one remedy for this misconduct: impeachment."
The committee will hold a public hearing on Monday to consider evidence gathered in the inquiry.
Republicans have called for a full day of proceedings to examine their own evidence, including a 110-page report saying the inquiry had found no evidence of an impeachable offence.
On Friday, the White House told Nadler it would not take part in the panel's hearings and condemned the inquiry as "completely baseless". Nadler, in turn, expressed his disappointment: "The American people deserve answers from President Trump."
House Speaker Nancy Pelosi, the top Democrat in Congress, directed the committee to draw up the charges on Thursday after weeks of investigation into Trump's request that Ukraine investigate former Vice President Joe Biden, a leading contender for the Democratic nomination to face the president in the 2020 US election.
Passage of formal charges in the Democratic-led House, now seen as all but certain, would lead to a trial in the Senate on whether to remove Trump from office. The Republicans who control the Senate have shown little sign of supporting Trump's removal.
While Trump has refused to co-operate with the House probe, he has made clear his lawyers will mount a defence in a Senate trial, where he believes he will prevail.
The Judiciary Committee is focused on two possible articles of impeachment that would accuse the president of abuse of power in his dealings with Ukraine and obstruction of Congress for refusing to cooperate with investigating committees.
Democrats also need to settle the question of whether to draft a third article alleging obstruction of justice based on former Special Counsel Robert Mueller's report on the federal investigation of Russian interference in the 2016 presidential election.
"That's something that we'll decide this weekend," Representative Debbie Mucarsel-Powell told reporters on Friday.
The probe has focused on a July 25 telephone call in which Trump asked Ukrainian President Volodymyr Zelenskiy to open an investigation into Biden and his son Hunter, and into a discredited theory promoted by Trump and his allies that Ukraine, not Russia, meddled in the 2016 election.
Trump is the fourth US president to face impeachment proceedings. None were removed from office, although Richard Nixon resigned as he faced almost certain impeachment in 1974 over the Watergate scandal.