Sen. Mark Warner said that a New York Times report of other foreign nations besides Russia meeting with Donald Trump Jr. during his father's campaign is being taken seriously.

The report said that Trump Jr. and other aides met with people including an emissary for two Arab princes and an Israeli social media specialist to help the president win the 2016 election.

"I don't understand what the president doesn't get about the law that says if you have a foreign nation interfere in an American election, that's illegal," Warner (D-Va.), the top Democrat on the Senate Intelligence Committee, said in a CNN interview.

Abby Huntsman said on "Outnumbered" that she understands Trump Jr.'s willingness to help his father at all costs.

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"You can do opposition research but when you go to other nations that want to hurt our way of living, that want to hurt our democracy, that's a completely different thing," she said.

The Times report states that "Two people familiar with the meetings said that Trump campaign officials did not appear bothered by the idea of cooperation with foreigners."

Trish Regan added that the alleged situation comes down to personal ethics.

"I wouldn't be taking meetings with the Saudis or the Russians if my dad were running for president," she said.

The report also notes that the alleged interactions "are a focus of the investigation" by Special Counsel Robert Mueller.

Mueller told Trump's legal team he'd be able to wrap up the Russia probe by Sept. 1 if he is able to interview the president by mid-July, according to Rudy Giuliani, the president's attorney.

However, a U.S. official called Giuliani's statement "entirely made-up," Reuters reported.

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