President Donald Trump hit back against calls for his impeachment on Monday ahead of a House Democrats’ conference call to discuss the Mueller Report, which makes damaging allegations that Trump may have obstructed justice and hindered Robert Mueller‘s investigation.

“Only high crimes and misdemeanors can lead to impeachment. There were no crimes by me (No Collusion, No Obstruction), so you can’t impeach,” Trump tweeted ahead of the conference. “It was the Democrats that committed the crimes, not your Republican President! Tables are finally turning on the Witch Hunt!”

Despite his claim, Democrats, including Sen. Elizabeth Warren, are moving forward with calling for impeachment proceedings against Trump.

Mueller’s report on Russian interference in the 2016 presidential election showed 10 instances where Trump may have obstructed justice. While Mueller ultimately did not reach a conclusion on whether he committed a crime, the special counsel left open the question of whether Congress could judge his actions.

Attorney General William Barr said in a letter to Congress last month that he would not pursue charges since it wasn’t clear whether Trump intended to obstruct Mueller’s investigation.

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While House Democrats have subpoenaed an un-redacted version of the Mueller Report, some Democrats are wary over impeachment proceedings that could risk their seats in the House so close to the 2020 elections.