Chris Hayes: The real reason behind the Republican Party infighting

Guests: Rep. Adam Schiff, Rep. Stacey Plaskett, Yurii Hundych, Alfie Williams, Gov. George Pataki The former vice president gets a subpoena as prosecutors draw a line between Trump and the Proud Boys in federal court. Congressman Adam Schiff on why America is owed the truth from Mike Pence. Then, Republican infighting keeps going public, as even Fox News pans their hearings. And bringing the frontlines of war to the sidelines of the Super Bowl: an interview with a Ukrainian soldier who is using the world's largest spectacle to keep attention on Putin's war.