John Kerry: Some evidence against Trump 'more powerful already than what we saw in the impeachment of Richard Nixon'

In an interview with CNN's Christiane Amanpour on Friday, former Secretary of State John KerryJohn Forbes KerryPresident Trump faces Herculean task in first debate Trump, Biden have one debate goal: Don't lose Trump-Biden debate: High risk vs. low expectations MORE commented on what he believes is serious evidence that has mounted against President TrumpDonald John TrumpFive takeaways from Trump-Biden debate clash The Memo: Debate or debacle? Democrats rip Trump for not condemning white supremacists, Proud Boys at debate MORE in the House impeachment inquiry. He went on to compare the situation to former President Nixon's impeachment.

"The evidence is powerful, some of it more powerful already than what we saw in the impeachment of Richard Nixon," Kerry said in the CNN interview. "The evidence at this point in time certainly merits the inquiry that is taking place."

The former secretary did not go as far as to say Trump should be impeached, stating "the evidence has to be examined," and that he did not want to draw conclusions.

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Kerry also called for allowing investigators to "do their work appropriately" days after a group of Republican lawmakers entered a secure room known as a sensitive compartmented information facility. 

"It would be far better for democracy and the whole world if the world could see a Congress in which everybody was respecting the legitimacy of this process and let the facts tell the story," he said. 

Speaker Nancy PelosiNancy PelosiGOP seeks to redirect criticism over Trump tax returns House rebuffs GOP lawmaker's effort to remove references to Democrats in Capitol Grassley says disclosing Trump's tax records without authorization could violate law MORE (D-Calif.) has launched an impeachment inquiry into Trump over his dealings with Ukraine. House members on several investigative committees have been hearing testimony from a series of current and former officials. 

Trump has denied wrongdoing on numerous occasions, calling his July 25 call with Ukrainian President Volodymyr Zelensky "perfect."  

Nixon resigned from office over the infamous Watergate scandal. Many believe he would have been impeached if he did not resign.