Rep. Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.) in an interview early Sunday dismissed comments from Donald Trump Jr. about a meeting with a Russian lawyer offering damaging information about Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE, saying, "We can't accept anything Don Jr. says."

Schiff, the top Democrat on the House Intelligence Committee, told ABC's "This Week" that "we have to rely on Don Jr.'s representation of what happened in that meeting" to believe President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's assertion that he had no knowledge it.

"And we've already seen we can't rely on that," Schiff added.

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“We can’t accept anything Don Jr. says, and of course, and we can’t accept much the president says about this either, because he has a similar record of not being forthcoming when it comes to Russia," Schiff added.

The congressman pointed out that Trump announced during a campaign speech at the time of the meeting in June 2016 that he would give out information on Clinton, but that the announcement was later cancelled.

"That would corroborate that Don Jr. didn’t get the information he was hoping for," Schiff said, "but of course it contradicts the idea that he was unaware."