Senate Democratic Whip Dick Durbin Richard (Dick) Joseph DurbinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death Democrats shoot down talk of expanding Supreme Court MORE (Ill.) says that Republicans should wait until January to confirm the successor to retiring Supreme Court Justice Anthony Kennedy, a frequent swing vote on the court.

Democrats are still irate over Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellFEC flags McConnell campaign over suspected accounting errors Poll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE’s (R-Ky.) decision in 2016 to hold the late Justice Antonin Scalia’s seat vacant for more than a year, blocking a hearing and vote on then-President Obama’s nominee, Merrick Garland Merrick Brian GarlandPoll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Chief justice honors Ginsburg: 'When she spoke, people listened' MORE.

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“Sen. McConnell set the new standard by giving the American people their say in the upcoming election before court vacancies are filled,” Durbin said in a statement, quoting McConnell's argument over Garland. “The U.S. Senate must be consistent and consider the president’s nominee once the new Congress is seated in January.”

Kennedy announced Wednesday that he will retire at the end of July.

Trump immediately announced that he would choose Kennedy's replacement from a previously released list of possible nominees, and McConnell said the Senate will confirm the nominee this fall.

Democrats pounced on McConnell for planning a confirmation vote on Kennedy’s successor before the midterm elections after he refused to hold a hearing or vote on Garland's nomination for more than a year. Scalia died in February of 2016.

Many Democrats are still sore about McConnell’s tactic, but the GOP leader has called it one of the proudest moments of his Senate career.

“Wait, so the thing about ‘the American people should have a voice in the selection of their next Supreme Court Justice’ wasn’t really about a concern for the American people,” Sen. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.) tweeted in reaction to McConnell's scheduling announcement.

“It was just about Obama?? I’m shocked!” he added.