Rep. Adam Schiff, D-Calif., said Democrats failed to explain why people should care about Russia's meddling in the 2016 presidential election.
"Where I think Democrats really fell down on the job is, we failed to persuade the country why they should care," Schiff, ranking member of the House Intelligence Committee, told David Axelrod on "The Axe Files," podcast.
"And that's not a mistake we can afford to make again. And probably one of the most valuable things I think that can come out of our investigation is an appreciation for what the Russians did; how they did that…certainly if they had the help of U.S. persons affiliated with the Trump campaign."
He said the U.S. must find a way to stop Russian interference in the future "because one of the key conclusions of the intelligence community is that the Russians will do this again," he said. "This is not a one-off. And, indeed, they are doing this right now in Europe.
"So, understanding how they operate and inoculating ourselves is going to be vital to the health of our democracy," he said.
On Wednesday, Schiff had told CBS News the most serious security crisis President Donald Trump will face comes from North Korea.
"I can say that probably the most serious national security crisis this president is going to face is when the regime gets to the point of when it can miniaturize a nuclear device and put it on an intercontinental ballistic missile," he said.
"That point will probably come during this four-year term of the president."
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