Former Sen. Al Franken Alan (Al) Stuart FrankenGOP Senate candidate says Trump, Republicans will surprise in Minnesota Peterson faces fight of his career in deep-red Minnesota district Getting tight — the psychology of cancel culture MORE (D-Minn.) mocked Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellHawley warns Schumer to steer clear of Catholic-based criticisms of Barrett Senate GOP set to vote on Trump's Supreme Court pick before election Harris slams Trump's Supreme Court pick as an attempt to 'destroy the Affordable Care Act' MORE’s (R-Ky.) Senate floor statement, comparing his speech to listening to serial killer Jeffrey Dahmer.

Franken took to Twitter to criticize McConnell’s Senate floor statement ahead of President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE’s impeachment trial.

“Listening to Mitch McConnell talk about the decline of bipartisanship is like listening to Jeffrey Dahmer complain about the decline of dinner party etiquette,” he said.

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Listening to Mitch McConnell talk about the decline of bipartisanship is like listening to Jeffrey Dahmer complain about the decline of dinner party etiquette. — Al Franken (@alfranken) December 19, 2019

Dahmer is an infamous serial killer who raped and killed 17 men and boys between 1978 and 1991 and was known for eating parts of his victims.

McConnell condemned House Democrats for voting to impeach the president in a Senate floor speech Thursday.

"Let's be clear: the House's vote yesterday was not some neutral judgment. ... It was the predetermined end of a partisan crusade," McConnell said.

Trump officially became the third president in U.S. history to be impeached after the House voted in approval of two articles of impeachment Wednesday night. The matter will move to a trial in the Senate, which is unlikely to vote to remove Trump.

McConnell has said he won’t be “impartial” about impeachment “at all,” prompting some Democrats to call for him to recuse himself from the trial.