If Harris wins and Democrats retake the House and hold the Senate, the party would be able to fulfill her pledge to raise taxes on corporations and the wealthiest Americans to help pay for Harris’s priorities, such as a bigger child tax credit. 

If Trump wins and Republicans recapture the Senate and hold the House, they would have the power to extend the tax cuts without compromising with Democrats — and possibly include some of the ideas that Trump has talked up recently on the campaign trail.

If neither party wins complete control of Washington, Republicans and Democrats will need to hash out a deal like they did in 2012 as the tax cuts signed by President George W. Bush expired.