What Factors will Determine how much Congress will put the President to Account?

-Which Party Controls Congress: A President will get their Legislative Agenda halted if Congress is Divided. Scrutiny becomes much Lower during Unified Congress -Willingness to use 'Imperial' Powers: Like the Veto. Presidents Recently have used the Veto for Influence -Circumstances: Such as Congress only being able to hold the President to Account if it has something the President Wants. A Decline of a Supreme Court Justice is Good for Congress showcasing its Powers, but it only could do this because of an Unexpected Supreme Court Vacancy