one by one, several of Donald Trump's former top advisers have told a special House committee investigating his role in the Jan. 6 insurrection that they didn't believe his lies about the 2020 election, and that the former president knew he lost to Joe Biden.

But instead of convincing Trump's most stalwart supporters, testimony from former attorney general Bill Barr and Trump's daughter Ivanka about the election and the attack on the U.S. Capitol is prompting many of them to simply reassert their views that the former president was correct in his false claim of victory.

Barr's testimony that Trump was repeatedly told there was no election fraud? He was paid off by a voting machine company, according to one false claim that went viral this week. Ivanka Trump saying she didn't believe Trump either? It's all part of Trump's grand plan to confuse his enemies and save America.

The claims again demonstrate how deeply rooted Trump's false narrative about the election has become.

“It's cognitive dissonance,” said Jennifer Stromer-Galley, a Syracuse University professor who has studied how Trump used social media and advertising to mobilize his base. “If you believe what Trump says, and now Bill Barr and Trump's own daughter are saying these other things, it creates a crack, and people have to fill it."

The lawmakers leading the hearings into the deadly attack on the U.S. Capitol said one of their goals is to show how Trump repeatedly lied to his supporters in an effort to hold onto power and subvert American democracy.