Democrats have officially won control of the House, picking up at least 26 seats. They needed a net gain of 23 seats to win.
Why it matters: House Democrats will have the power to push back against President Trump and investigate his actions. Republicans have been bracing for a slew of investigations they think House Democrats will launch into Trump and those around him. And they'll have the power to introduce articles of impeachment against Trump — if they choose to do it.