The process which could see President Donald Trump removed from the White House has taken a significant step after a motion was passed to submit impeachment articles.
The US House of Representatives voted in favour of sending the trial papers to the Senate, with Mr Trump accused of abuse of power and obstruction of Congress.
The Republican president has been vocal in his denial of any wrong doing, but is accused of attempting to push Ukraine’s leader to launch an investigation into political rival Democrat Joe Biden.
The resolution passed largely along party lines by 228 votes to 193, reports the BBC .
House Speaker Nancy Pelosi signed the documents alongside the team of Democratic lawyers who will prosecute the case against the president.
The Democrats control the House and opted to impeach Mr Trump in December but it is the Republican-majority Senate that will decide whether to convict and remove him.
At a press conference before the signing of the articles, Mrs Pelosi said: “Today we will make history.
“When the managers walk down the hall, we will cross a threshold in history – delivering articles of impeachment against the president of the United States for abuse of power and obstruction of the House.”
With the articles then sent to the Senate with leader Mitch McConnell saying they would be exhibited at noon today, while the trial is set for Tuesday – the third of a US president in history, the last being Bill Clinton.
The accusations relate to a phone call Mr Trump had on July 25 last year, with Mr Biden now in the race to become the Democratic Party’s White House nomination.
Mr Biden’s son Hunter took up a board position with a Ukrainian energy firm while his father handled American-Ukraine relations as vice-president of Barack Obama, Trump’s predecessor.
Mr Trump had has claimed unsubstantiated corruption, as a result.