House Intelligence Committee Chairman Adam Schiff, D-Calif., is treating the American public like "idiots" by relying on hearsay and circumstantial evidence to impeach President Trump, Rep. Lee Zeldin, R-N.Y., said Sunday on "America's News Headquarters."

"The people who are pushing for impeachment have been pushing for impeachment since Donald Trump was elected -- since he was getting sworn into office," Zeldin told Fox News' Eric Shawn. "Adam Schiff really does think that many Americans are idiots.

"If you remember March 22nd, 2017, he goes on another network, and he says that he has more than circumstantial evidence that President Trump colluded with the Russians. This is evidence that he hasn't yet produced, [that] I haven't seen, [former Special Counsel Robert] Mueller couldn't find," he continued. "He made up what he called a parody version of the [July 25] call transcript, but he only said that after he got called out."

Schiff had attempted to clarify in September, "Of course, the president never said, 'If you don't understand me, I'm going to say it seven more times.' My point is, that's the message that the Ukraine president was receiving in not so many words."

Zeldin also challenged Schiff for failing to disclose that his congressional team met in private with the whistleblower who sparked the impeachment inquiry. The Republican also said the facts of the case remained on the president's side.

"It turns out that [Schiff's] team was in contact with the whistleblower before this person had even filed the whistleblower complaint or had even hired an attorney," he said.

ADAM SCHIFF CLAIMS CASE AGAINST TRUMP IS 'IRONCLAD' BUT WON'T SAY IF HE'LL BE IMPEACHED

"He's made claims during his opening statements and his closing statements -- trying to write the world's greatest parody... trying to connect dots that aren't actually connected," Zeldin added.

"He'll say something's a firsthand truth that shouldn't be doubted and then you dig deeper and you realize it's actually Ambassador [William] Taylor telling us that, Tim Morrison told him that [Amb. Gordon] Sondland told Morrison -- the president told Sondland, give me a break... The facts are on the president's side."

He also said Congress should be passing the United States–Mexico–Canada Agreement, "but instead, he is trying to pay off the people who put the gavel in his hand."

Schiff commented on the Democrats' impeachment push during an interview earlier Sunday with CNN's "State of the Union," and said despite an "ironclad" case against the president, he couldn't say if his party will impeach Trump or not.

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"If the facts aren’t contested and your committee is writing up the report and you don't, at least as of now, have any scheduled witnesses or depositions -- do you think President Trump should be impeached?" host Jake Tapper asked.

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"I want to discuss this with my constituents and my colleagues before I make a final judgment on it," Schiff replied. "But, there are a couple of really important things we need to think about."

Fox News' Eric Shawn contributed to this report.