New York (CNN Business) Bill Moyers, the legendary former PBS host and network news commentator, says he fears for the United States "for the first time in my long life."

Moyers joined me on Sunday's "Reliable Sources" for a conversation about the looming impeachment hearings and the important role of the broadcast networks.

He covered both the Nixon and Clinton impeachment proceedings, but he says that this time is different.

"A democracy can die of too many lies. And we're getting close to that terminal moment unless we reverse the obsession with lies that are being fed around the country," he said, pointedly commenting on President Trump and the president's allies.

But Moyers also expressed hope.

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