Washington (CNN) Former FBI Director James Comey, who has previously called on voters to oust President Donald Trump from office in 2020, said Wednesday that recent developments in the Ukraine scandal means "we may now be at the point" where Congress must impeach the President.

Comey, a staunch critic of Trump, appeared to shift his views hours after the release of a White House transcript of Trump's call with Ukrainian President Volodymyr Zelensky on Wednesday in which Trump repeatedly pressured his Ukrainian counterpart to investigate former Vice President Joe Biden and his son Hunter.

"Some media are quoting me from last week about my hope that America will remove Donald Trump by an election, not impeachment," Comey said in a Twitter post. "But we may now be at the point where members of the House and Senate can't uphold their own oaths to support and defend the Constitution without acting."

Some media are quoting me from last week about my hope that America will remove Donald Trump by an election, not Impeachment. But we may now be at the point where members of the House and Senate can't uphold their own oaths to support and defend the Constitution without acting. — James Comey (@Comey) September 25, 2019

When asked in an interview with CNN affiliate KCRA last week if he thought Trump should be impeached, Comey said Congress should figure out whether alleged actions mentioned in the Mueller report would "trigger impeachment," but as a citizen he hoped Trump would not be impeached.

"Because I think the American people would be let off the hook if Donald Trump were impeached and removed from office, and a lot of his supporters would think some kind of coup had taken place," Comey said in the KCRA interview. "We need to take responsibility for this and vote next November and show that we have a certain set of values and we insist that our leaders reflect those values. So we need an inflection point. An impeachment would deprive us of that and we need to show what we stand for."

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