In those hearings they aren't sworn in so they can say anything & it doesn't count as evidence. Here's what President Reagan's press secretary says: https://www.msn.com/en-us/news/politics/trump-s-claims-of-voter-fraud-are-delusional-and-dangerous-former-reagan-press-secretary/vi-BB1bIaUL?ocid=msedgdhp
Here's what a trial lawyer says: https://www.youtube.com/watch?v=ha7iWECm_8E&feature=emb_logo