 Congress would need to rely heavily on impeachment. If there's evidence that the Vice President is involved in a cover-up, the House can impeach the Vice President. The Senate then holds a trial, right? And a two-thirds majority is required to convict and remove the Vice President. Meanwhile, Congress can also pursue impeachment of the President at the same time, concurrently, if they believe the situation warrants it. I'm thinking the situation warrants it.