Conservative radio host Hugh Hewitt said Tuesday he thinks President Trump is on "constitutional thin ice" and could face impeachment if Democrats regain control of the House in 2018.

"President Trump has to be aware of the constitutional thin ice on which he skates," Hewitt said during an interview with Yahoo anchor Katie Couric, referring to allegations of conflicts of interest that have already dogged Trump in his first few days in office.

“I think it would occur after midterms and only if the House flips to the Democrats. So the potential is there, yes,” Hewitt said.

Trump has faced questions about potential conflicts of interest, including over his hotel in Washington, D.C.

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The watchdog group Citizens for Responsibility and Ethics in Washington sent a letter to the General Services Administration after Trump was sworn in citing concerns that Trump's hotel was in violation of its lease with the government and could also violate the emoluments clause of the Constitution that prevents foreign leaders from giving gifts to government officials.

“If you abuse power, if you do anything — you don’t have a lot of goodwill in the reservoir," Hewitt said.

"He’s beginning his presidency successfully in my view with a few very bold initiatives, but with the highest negatives of any incoming president since Gallup kept track. That says to me: thin ice, move carefully.”

Hewitt noted that many of Trump's detractors are not likely to be convinced that Trump is "a good man."

"When half a million people showed up at the mall, they can’t be assuaged," Hewitt said, citing the Women's March on Washington the day after Trump's inauguration.

"There were 600 marches around the country. They don’t care about conflicts — they will never be persuaded he’s a good man. The only way Trump expands his base is to do thing. Build things, get things done."

"If he does things that moves to the middle, people will forget these conflicts," Hewitt suggested.