US President Donald Trump’s historic impeachment trial is all set begin in Senate on Tuesday with Democrats calling for his removal from office and Republicans determined to acquit him- and quickly, if possible.

The job of these lawmakers, sworn in last week as jurors, is to decide if Trump abused his office and obstructed Congress as charged in two articles of impeachment approved last month by the House of Representatives.

They state that Trump tried to pressure Ukraine into interfering in the 2020 US election to help him win, and then tried to thwart a congressional probe of his behaviour.

Democrats, who control the House of Representatives and led the investigation, accuse Trump of manipulating Ukraine by withholding nearly $400 million in military aid for its war against Russian-backed separatists and a White House meeting for Zelensky until the latter announced a Biden probe.

On December 18, President Trump was formally impeached in a historic vote in the House of Representatives.

On Saturday, Trump’s legal team presented its line of defense for his impeachment probe, a process they dismissed as unconstitutional and “dangerous”.

In an initial response to the president’s being charged, written by Cipollone and Sekulow, the defense said that the articles of impeachment — passed by the majority-Democrat House of Representatives — “are a dangerous attack on the right of the American people to freely choose their president.”

On Monday, Senate Majority Leader Mitch McConnell proposed rules calling for each side to have 24 hours over two days to present their arguments which makes for long trial days stretching late into the night but is a significantly quicker pace than in Bill Clinton’s impeachment trial in 1999. The chamber will debate and vote on the proposed rules Tuesday.

McConnell has said he won’t consider the witness issue until after the arguments and questioning take place, and his majority means he will likely prevail.

On Wednesday, House Speaker Nancy Pelosi signed the articles of impeachment charging President Trump with abuse of power and obstruction of Congress which were delivered to the Senate.

Pelosi argued that the president’s conduct when it came to Ukraine left Democrats with “no choice but to act,” charging that Trump abused the powers of the presidency and leaving little doubt that the House will hold a vote to impeach him as early as before Christmas.

On Friday, President Trump unexpectedly brought up the impeachment during a reception at the White House for the Louisiana State University football team four days after they were crowned national champions.

Pelosi argued that the president’s conduct when it came to Ukraine left Democrats with “no choice but to act,” charging that Trump abused the powers of the presidency and leaving little doubt that the House will hold a vote to impeach him as early as before Christmas.

In September, the impeachment inquiry, which Nancy Pelosi initiated over a complaint by an anonymous whistleblower, is looking into White House’s alleged efforts to withhold military aid to have Ukraine investigate a Trump’s political rival, Joe Biden.

(With inputs from agency)