What is the Key Factor for the President's Relationship with Congress?

-Party in Control of Either House, or Congress overall. A Congress on different Party Control of that of the President can Hinder Progress. -Once they lose Control of Congress, Presidents rely much more on the Veto. All of the Bushes 12 Vetoes 10 Vetoes from Obama came from the Last 2 years of their Presidency. Trump's 10 Vetoes came from Losing Control of the House in 2019. All of Biden's 10 Vetoes came from after Loosing the House