Republicans, Democrats remain at an impasse over what a trial will look like as they head home for holiday break.

US senators who control the fate of President Donald Trump left Washington, DC, for a holiday break on Friday with no agreement over how they will handle the Senate trial to consider his impeachment charges in January.

Trump stands little chance of being convicted and removed from office by the Republican-controlled Senate, which is due to take up the two impeachment charges passed on Wednesday by the Democratic-led House of Representatives.

Republicans and Democrats are at loggerheads over how the Senate trial will play out. Democrats want to call top Trump aides as witnesses, and House Speaker Nancy Pelosi has not yet sent the impeachment package over to the Senate in a bid to ramp up the pressure. The Senate must receive the articles before any trial can take place.

Many Republican senators would prefer a quick trial to get the matter behind them, and Senate Republican Leader Mitch McConnell has dismissed the idea of calling witnesses.

He said Democrats are delaying because they have lost confidence in their case.

“The prosecutors appear to have developed cold feet,” he said on Thursday.

But Democrats reject that notion and instead say they want to see a fair trial that lays out the evidence before the American people.

“Frankly, I don’t care what Republicans say,” Pelosi told reporters on Thursday.

Trump impeached

No matter the outcome, Democrats have ensured that Trump will go down in history as one of only three US presidents to be impeached, following Andrew Johnson in 1868 and Bill Clinton in 1998. Richard Nixon resigned in 1974 as he faced impeachment.

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Trump, 73, is accused of abusing his power by holding back $391m in security aid to Ukraine in an effort to get Kyiv to announce a corruption investigation of former Vice President Joe Biden, a leading candidate for the Democratic nomination to face Trump in the 2020 election.

The president is also charged with obstruction of Congress for directing administration officials and agencies not to cooperate with the impeachment inquiry.

Trump has dismissed his impeachment as a hoax and partisan bid to undo his surprise 2016 election win. He says he did nothing wrong.

‘Deeply immoral’

A Senate trial would kick off a politically charged year heading into the presidential election, which will pit Trump against one of a field of 15 Democratic contenders.

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The impeachment trial could pose logistical challenges for the four Democratic senators in the race, as the first nominating contest takes place in Iowa on February 3. The senators would join their colleagues to act as jurors during the trial.

“This impeachment process is more important than anyone’s schedule,” one of those candidates, Senator Amy Klobuchar, said on Thursday.

Trump’s presidency has polarised the United States, dividing families and friends and making it more difficult for politicians in Washington, DC, to find a middle ground as they confront challenges such as the rise of China and climate change.

Christianity Today, a magazine founded by the late US evangelist Reverend Billy Graham, called on Thursday for Trump’s removal from office in an editorial that branded the effort to get Ukraine to probe Biden as “profoundly immoral”.

Republican presidential candidate Donald Trump stands during a service at the International Church of Las Vegas in Las Vegas [File: Evan Vucci/AP Photo]

Trump questioned Christianity Today’s success and dismissed its call for his removal.

“No President has done more for the evangelical community, and it’s not even close,” Trump tweeted, without providing evidence.

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Christianity Today Editor Mark Galli, in response, said Trump’s conduct was an urgent concern.

“We rarely comment on politics unless we feel it rises to the level of some national … concern that is really important. And this would be a case,” he told CNN in an interview. “This is something we need as a movement to think about, pray about at this time in our life.”

Evangelical Christians make up about 25 percent of US voters, according to Pew Research, and have been a bedrock of Trump’s support. In 2016, he took over 80 percent of the group’s votes, according to Pew’s polling.

Fewer than half of Americans want Trump removed from office, according to a Reuters/Ipsos poll released on Thursday.