Utah's Sen. Mitt Romney, who recently announced that he might reject President Trump's re-election offer, has tweeted on Sunday that it would be "extremely worrying" if the president appealed to his Ukrainian counterpart, Joe Biden and his Colleagues initiate investigations son Hunter.
Romney said in a tweet on Sunday that it was "crucial that the facts become known".
Trump described his talks with President Volodymyr Zelenskiy as "perfect and routine."
Nothing was said that would be wrong in any way, "said Trump.
Trump was reportedly accused of pressuring Zelenskiy to work with his personal lawyer Rudy Giuliani to investigate Hunter Biden and use military aid as a lever.
Trump denied having made any inappropriate petitions, but pointed to the Bidens and their relationship with Ukraine.
The son of the Democratic presidential hopeful, Hunter Biden, had been investigated in connection with business interests.
Biden said in the past that the US would withhold $ 1
Biden told reporters in Iowa on Saturday that "Trump deserves to be investigated. He violates every basic norm of a president. You should ask him why he is phoning a foreign leader to intimidate a foreign leader when that happened. "
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He accused Trump of" doing that because he knows I'm going to beat him like a drum and he uses the abuse of power and every element of the presidency to try to do something to pollute me. "
Trump accused Biden of dishonesty claiming this He never spoke to his son about his business dealings with a Ukrainian energy company, even though Hunter Biden told the New Yorker they "only once" talked about it.
Edmund DeMarche of Fox News, Ronn Blitzer, Nick Givas and the Associated Press have contributed to this report