Sen. Ron Johnson
Ronald (Ron) Harold JohnsonPelosi: Dropping 9/11-style Jan. 6 commission an 'option' amid opposition Wisconsin state Treasurer Sarah Godlewski launches Senate bid Biden picks vocal Trump critics to lead immigration agencies MORE (R-Wis.) said on Monday that he thinks President Trump
Donald TrumpFreedom Caucus member condemns GOP group pushing 'Anglo-Saxon political traditions' MyPillow CEO Mike Lindell's new free speech site to ban certain curse words Secret Facebook groups of special operations officers include racist comments, QAnon posts: report MORE has changed the presidency, but signaled it isn't necessarily in the right direction.


Johnson added that former President Clinton had also shifted the "behavior and the standard of the presidency."
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"It's unfortunate. I revere our Constitution. I revere these institutions, including the office of the presidency. It would be nice if everybody conducted themselves, I guess, the way we would here in Wisconsin," Johnson continued.
Johnson was asked about Trump's behavior, but didn't point to a specific incident during the interview. His comments come as Congress is locked in an impeachment fight fueled by the president's interactions with the leader of Ukraine.
Johnson, who has emerged as one of Trump's most vocal supporters on Ukraine, said on Monday that "there has been a concerted effort from Day 1 to sabotage this administration."
"I don't agree with everything he's doing, but I have to give him a great deal of credit," Johnson said.


Johnson said on Monday that there was no "quid pro quo" in the Trump call, but that he has "a lot of questions" about Ukraine and Democrats.
"Everybody says well there's no evidence, all these things have been debunked. ... [But] I have all kinds of questions dating back to Hillary Clinton
Hillary Diane Rodham ClintonPelosi on power in DC: 'You have to seize it' Cuba readies for life without Castro Chelsea Clinton: Pics of Trump getting vaccinated would help him 'claim credit' MORE's email scandal," Johnson said.

Johnson and Sen. Chuck Grassley
Chuck GrassleyGrassley: Iowa can't afford to be 'babysitting' unaccompanied minors Anti-Asian hate crimes bill overcomes first Senate hurdle On The Money: Senate confirms Gensler to lead SEC | Senate GOP to face off over earmarks next week | Top Republican on House tax panel to retire MORE (R-Iowa) sent a letter late last week to the Justice Department asking for an investigation into any ties between Hillary Clinton and Ukraine.

Johnson has also called for an investigation into Biden, including suggesting that a Senate investigation would be "completely appropriate."