Who will testify Tuesday?
An Ohio man who accused President Joe Biden, other Democrats, and the mainstream media of "treason" is set to testify in the public hearing this afternoon before the House committee investigating the Jan. 6 attack on the Capitol, according to a source familiar with the matter.
The hearing is expected to focus on the rise of radical extremism in the United States, and the source said one of the key witnesses will be Stephen Ayres of Warren, Ohio, who recently admitted to illegally entering the Capitol on Jan. 6, 2021.
A former spokesman for the Oath Keepers militia group, Jason Van Tatenhove, will also be testifying Tuesday, the source said.
-ABC News' Katherine Faulders and Mike Levine