Donald Trump was acquitted in his impeachment trial on Saturday on a charge of inciting insurrection in a January 6 speech to supporters just before hundreds of them stormed the US Capitol.
While the majority of Republican senators sided with Trump and backed his acquittal, seven Republican senators joined the Democrats and voted to convict the Republican former president on the single charge. One of them, Richard Burr, had previously voted that the proceeding was unconstitutional because Trump left office on January 20, a motion rejected by the Senate.
Burr said while running for office in 2016 that he would not seek re-election in 2022. The senator from North Carolina had already been unpopular with Trump's allies for his work heading the Senate Intelligence Committee, which had probed Russian meddling in the 2016 US election. Trump had opposed the investigation.
The senator from Louisiana on Tuesday joined five Republican colleagues in voting that the proceeding was constitutional, reversing his stance from an earlier vote on the issue. Cassidy told reporters after the House impeachment managers presented on Tuesday that they had "a very good opening."
The senator from Nebraska handily won re-election in 2020 and is considered a potential contender for the 2024 Republican presidential nomination. He publicly denounced Trump's false claims of widespread electoral fraud and said there was no basis to object to Democrat Joe Biden's Nov. 3 victory.
Murkowski of Alaska became the first US senator in 50 years to win an election with a write-in campaign in 2010 after losing in the Republican primary. She called for Trump to resign after his followers rioted at the Capitol on January 6 to disrupt the formal certification of the election by Congress.
Romney, a Utah senator and the 2012 Republican presidential candidate, has been a vocal critic of Trump. In 2020, Romney was the only Republican senator to vote for conviction during Trump's first impeachment trial.
The Pennsylvania senator announced in October 2020 he would not be seeking re-election. He said in television interviews that Trump committed "impeachable offenses" and called on him to resign after the January 6 attack.
The Maine centrist was the only Republican senator re-elected in 2020 in a state also won by Biden. She said Trump had incited the January 6 riot.