President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE on Tuesday offered an all caps rallying cry as his impeachment trial in the Senate commenced with a debate over rules, urging his Twitter followers to read the transcripts.

The president sent the tweet as he made his way back to his residence for the night in Davos, Switzerland, where he is attending the World Economic Forum. The three-word message marked Trump's first commentary since the trial began Tuesday.

The tweet came as House Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.) offered a 45-minute statement imploring the Senate to admit additional witnesses and evidence.

READ THE TRANSCRIPTS! — Donald J. Trump (@realDonaldTrump) January 21, 2020

Trump is in Switzerland attending the World Economic Forum and meeting with political and business leaders. He is set to return to Washington, D.C., on Wednesday.

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The president and his defenders have repeatedly pointed to two rough transcripts of his calls with Ukrainian President Volodymyr Zelensky, which they assert shows Trump did not engage in impeachable conduct.

One transcript shows the two leaders exchanging pleasantries after Zelensky's election last year. The other, which is part of what triggered the formal impeachment inquiry, shows Trump urging Zelensky to investigate Democrats and former Vice President Joe Biden Joe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE.

The House last month impeached Trump for abuse of power and obstruction of Congress, alleging Trump made security aid and a White House meeting for Ukraine contingent on the country announcing the investigations.

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The Senate trial got underway in earnest on Tuesday, with senators expected to spend hours debating the rules that will govern the proceedings.

Schiff, who has been a leading voice on impeachment and emerged as one of Trump's chief foils, delivered a lengthy statement in which he sought to use the president's own words against him.

He played video on the Senate floor of Trump saying he would have no problem with some of his top officials testifying, followed by another clip in which the president said he planned to "fight all the subpoenas."

"If the president wishes to contest the facts … he must not continue to deny the Senate access to the relevant witnesses and documents that shed light on the very factual matters he wishes to challenge," Schiff said.

Trump's legal team has argued the allegations against the president do not reach the threshold for impeachable conduct.