When asked about the GAO report, Murkowski said it reminded her of when she and others voted against President Trump in his pursuit of emergency border wall funds past year.
(AP Photo/ Evan Vucci).
The head of state is implicated of hanging 2 points as negotiating chips to Ukraine - keeping $400 m of armed forces help to Ukraine that had actually now been assigned by Congress, and a White House conference for Ukraine's head of state.
Trump was recently impeached on account of two articles: "abuse of power" and the "obstruction of Congress", which was approved by the Democratic-led House a year ago.
(AP Photo/Alex Brandon, file).
White House counsel Pat Cipollone will be lead lawyer, backed by Trump's personal attorney Jay Sekulow.
Democrats and lawyers for the president are seeking to make their case for an American public bracing for a presidential election in 10 months.
Calling on the Republican-controlled Senate to clear him of both charges - abuse of power and obstruction of Congress - Trump says that the House-driven impeachment push was an attempt to upend the result of the 2016 election and sway the looming one.
Speaking by phone Friday evening, Alaska's other senator, Dan Sullivan, noted numerous bills passed by the Senate the previous week and the expected slow-down that impeachment would have on the Senate's work.
One Republican whose votes are closely watched, Sen. She also acknowledged the political pressure bearing down on senators.
And they once again attacked the process by which House Democrats impeached Mr Trump, accusing them of denying the President his due process rights.
Trump's legal team issued a resounding rejection of the impeachment charges, which were read out in the Senate earlier in the week during formalities setting the stage for the trial. Celebrity lawyer Alan Dershowitz is also in Trump's dream-team.
With Republicans controlling the Senate 53-47, they can set the trial rules - or any four Republicans could join with Democrats to change course. The managers - Congressmen Adam Schiff, Jerrold Nadler, Zoe Lofgren, Hakeem Jeffries, Val Demings, Jason Crow, and Sylvia Garcia - were named by House Speaker Nancy Pelosi.
Trump's answer to the summons was the first salvo in what will be several rounds of arguments before the trial formally begins.
Graham was responding to a move on Saturday by House Democrats, who underlined their assertion that President Trump abused his office and should be removed.
Trump denies the charges and has called the impeachment proceedings a "sham", "hoax", and "witch hunt".
Even as Senate Majority Leader Mitch McConnell of Kentucky has said he was working with the White House on the trial's parameters, he doesn't want to make the proceedings look like a sham.
Lee, who declined to comment last week outside the Senate chamber, said he has a goal for the outcome of the trial, and he's unabashedly laying it out.
The Trump team refutes the allegation that he pressed Ukrainian President Volodymyr Zelenskyy to launch an investigation into Joe Biden.
"President Trump illegally ordered the Office of Management and Budget to withhold $391 million in taxpayer-funded military and other security assistance to Ukraine". The money was later released after Congress complained.
"The Senate must use that remedy now to safeguard the 2020 USA election, protect our constitutional form of government, and eliminate the threat that the president poses to America's national security", they said.
"Unless he is removed from office, he will continue to endanger our national security, jeopardize the integrity of our elections, and undermine our core constitutional principles".
The House managers, or prosecutors in the impeachment trial, filed their official brief on Saturday, in which they said that Trump's conduct "is the Framers' worst nightmare", referring to the authors of the US Constitution.