He was on explicit notice that his election fraud claims were complete bullshit. Yet, Trump marched forward with the Big Lie as part of the attempted coup, and at a minimum, to defraud the United States and obstruct an official proceeding.
Should the DOJ prosecute Trump? Yes. Will they? No. See Richard Nixon.
Will these hearings provide enough momentum in GOP to move away from Trump for 2024? Doubtful, but possible.
A Desantis/Tim Scott ticket would be formidable. If Trump is the 2024 nominee, GOP will get slaughtered.