Testimony by a Trump White House aide in the latest January 6 Capitol riot hearing is being described as "blockbuster".
Cassidy Hutchinson revealed then President Donald Trump knew his supporters were armed before they stormed the Capitol buildings in Washington in 2021.
She claims he even went to extraordinary lengths to join them.
During the hearing Mr Trump quickly took to social media saying he hardly knows Ms Hutchinson.
However, other former aides and former Trump allies have vouched for Ms Hutchinson's proximity to the President and her damning testimony against him.
Politico Senior Legal Affairs Reporter Josh Gerstein spoke to Susie Ferguson.
