The U.S. Senate on Saturday acquitted former President Donald Trump on an impeachment charge of inciting an insurrection.

The acquittal comes more than a month after a mob of Trump supporters stormed the U.S. Capitol as lawmakers were counting the electoral results that certified Trump's loss. Five people died in the riot, including a police officer. Two other officers later killed themselves.

A majority of senators voted to convict Trump — 57 to 43, including seven Republicans. But two-thirds, or 67 votes, was needed to convict. It was the second time Trump was acquitted in an impeachment trial.

The seven GOP senators who voted to convict Trump on Saturday were: Richard Burr of North Carolina, Bill Cassidy of Louisiana, Susan Collins of Maine, Lisa Murkowski of Alaska, Mitt Romney of Utah, Ben Sasse of Nebraska and Pat Toomey of Pennsylvania.

Trump is the first president in U.S. history to be impeached by the House twice, and the first to be tried for impeachment after leaving office.

The verdict closes the book on this Trump presidency, though the Senate, by not convicting and barring him from holding public office in the future, left open the possibility that Trump, a 74-year-old Republican, could run again for president.

President Trump vowed to campaign against Republican Senator Lisa Murkowski on Thursday, after she agreed with former Defense Secretary James Mattis’ scathing criticisms of the president and said she is struggling with whether to continue supporting Mr. Trump. Mr. Trump said he’ll endorse anyone with a “pulse” who runs against Murkowski when she’s up for reelection in 2022.