Sen. Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.), a White House hopeful, said Sunday she would not let her vice president's child sit on a foreign board.

The comment comes as President Trump pushes an attack on leading 2020 candidate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE centered on Biden's son sitting on a gas company's board in Ukraine.

CNN's "State of the Union" host asked Klobuchar on Sunday if she would allow her vice president's kid to sit on a foreign board.

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"No, I wouldn't," she said. "And I can promise you right now by own daughter, who is only 24, does not sit on the board of a foreign company."

But the senator quickly shifted back to focus on Trump's alleged wrongdoing and stood by Biden in defending him against the unfounded allegations by the Trump campaign.

"There is no evidence that ... the vice president did something wrong here," she said. "What really matters is that the president was repeatedly trying to get dirt on a political opponent. That is the issue here."

Trump is facing an impeachment inquiry over allegations of asking Ukraine to investigate Biden.