Clerk of the House carries the articles of impeachment against Donald Trump to the Senate in Washington. AP
Two articles of impeachment against Donald Trump were delivered from the US House to the Senate on Wednesday, setting in motion the trial of the 45th US president.
Democratic House Speaker Nancy Pelosi signed the articles, which charge Trump with abuse of power and obstruction of Congress, before they were ceremonially walked through the Capitol to the Republican-controlled Senate.
"So sad, so tragic for our country, that the actions taken by the president to undermine our national security, to violate his oath of office and to jeopardize the security of our elections, has taken us to this place," said Pelosi, before using several ceremonial pens to sign the articles.
Held in blue folders, the articles were delivered to a Senate clerk by officials including the House managers chosen to prosecute the case against Trump, after a message notifying the Senate of the impeachment charges was read aloud on the floor of the chamber.
Senate Majority Leader Mitch McConnell then invited House managers to formally read the articles on the Senate floor at noon Thursday.
Later that day at 2:00 pm, US Supreme Court Justice John Roberts will arrive to be sworn in.
"Then the chief justice will swear in all of us senators," a somber McConnell said on the floor.
The Senate will be converted into a court of impeachment for only the third time in US history.
"The trial will commence in earnest on Tuesday," McConnell said.
"We'll pledge to rise above the petty factionalism and do justice for our institutions, for our states and for the nation," he said.
"I'm confident that this body can rise above short-termism and factional fever and serve the long-term best interests of our nation. We can do this, and we must."
McConnell said the White House would be notified of Trump's pending trial, and that the Senate will "summon the president to answer the articles and send his counsel."
Trial expected to last two weeks
Trump is accused of secretly holding up aid to Ukraine between July and September to pressure Kiev to investigate former vice president Joe Biden, the Democratic frontrunner in this year's White House race.
He was formally impeached on December 18 when the Democratic-controlled House charged him with abusing his power by illicitly seeking help from Ukraine for his reelection.
The president is also charged with obstruction for holding back witnesses and documents from the House impeachment investigation in defiance of Congressional subpoenas.
Wednesday's ceremonial procedures mark the end of a weeks-long standoff between House Democrats and the Senate's Republican leadership over whether to call witnesses in the trial.
Pelosi has demanded witnesses testify, including key Trump administration officials with firsthand knowledge of the president's efforts to pressure Ukraine which formed the basis of his impeachment.
Republicans say they will only consider witnesses once the initial trial rules are approved and the trial, expected to last two weeks, is underway.
Trump's conviction in the Senate is highly unlikely as the president's Republican Party has a 53-47 majority. A two-thirds super-majority of senators is required to find him guilty and remove him from office.Agence France-Presse
Almost simultaneously, House impeachment managers responded to an earlier Trump filing, saying the president had engaged in "corrupt conduct... to cheat in the next election" and that the Senate should remove him from office "following a fair trial."
US Chief Justice John Roberts takes charge of trial in Senate, gives the oath office to 99 of the 100 senators, who will act as jurors. One was missing because of a family medical problem.
As the third presidential impeachment trial in US history began in earnest, Trump's chief legal defender argued the Democratic case was a baseless effort to overturn the 2016 election but a top Democratic lawmaker said there was "overwhelming" evidence of wrongdoing.
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