Former President George W. Bush's chief ethics lawyer on Tuesday said President Trump calling for Hillary ClintonHillary Diane Rodham ClintonJill Stein: 'I am not a Russian spy' Trump criticizes Clinton for suggesting Jill Stein was Russian asset Graham: I'm seeking to make Trump successful 'but not at all costs' MORE to be prosecuted is an “impeachable offense.”

“Pressuring [attorney general] to prosecute the person who lost the election is an impeachable offense if we value free elections,” Richard Painter tweeted.

Trump in an early morning tweet Tuesday ramped up his criticism of Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsTrump attacks Sessions: A 'total disaster' and 'an embarrassment to the great state of Alabama' Ocasio-Cortez fires back at Washington Times after story on her 'high-dollar hairdo' Trump's tirades, taunts and threats are damaging our democracy MORE, saying Sessions, one of his earliest allies in the 2016 campaign, “has taken a VERY weak position on Hillary Clinton crimes.”

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The president’s calls for Clinton to be prosecuted contradicts his claim in November that he wouldn’t follow through on a campaign pledge to seek an investigation into the former secretary of State.

“It’s just not something that I feel very strongly about,” he told The New York Times, saying that prosecuting his former Democratic rival would be “very, very divisive for the country.”

Trump also said at the time that he didn’t think the decision would disappoint his supporters.

“I think I will explain it that we in many ways will save our country,” he said.

Trump on Monday described Sessions as “beleaguered” and in an interview last week said he was disappointed that the attorney general had recused himself from the Justice Department's investigation into Russian election meddling.

Sessions, a former senator from Alabama, stepped aside after it was revealed that he did not disclose during his confirmation hearings that he met with Russia's ambassador to the United States during the 2016 campaign, when he was advising the Trump campaign and appearing as a surrogate. 

The Washington Post reported that Trump and his advisers are floating possible replacements for Sessions, including Sen. Ted CruzRafael (Ted) Edward CruzHillicon Valley: GOP lawmakers offer election security measure | FTC Dem worries government is 'captured' by Big Tech | Lawmakers condemn Apple over Hong Kong censorship Lawmakers condemn Apple, Activision Blizzard over censorship of Hong Kong protesters The Hill's Morning Report — Trump's impeachment jeopardy deepens MORE (R-Texas) and former New York City Mayor Rudy Giuliani (R).

However, Giuliani said on Monday that he’s not being considered for the position, and Cruz denied being under consideration.