Head of NPR claims the biggest challenge to "disinformation" is getting rid of the 1st Amendment.

Katherine Maher says the "the number one challenge" in her fight against disinformation is "the First Amendment in the United States," which makes it "a little bit tricky" to censor "bad information" and "the influence peddlers" who spread it.

JUST IN: NPR editor and whistleblower Uri Berliner has resigned from NPR, blasts their new CEO Katherine Maher on his way out.

Berliner was serving a five-day suspension after calling out the extreme liberal bias at NPR.

"I am resigning from NPR, a great American institution where I have worked for 25 years. I don’t support calls to defund NPR," Berliner (@uberliner) said.

"I respect the integrity of my colleagues and wish for NPR to thrive and do important journalism. But I cannot work in a newsroom where I am disparaged by a new CEO whose divisive views confirm the very problems at NPR I cited in my Free Press essay."