Republicans held on to their narrow majority in the U.S. House, giving Donald Trump and his party unified control of the elected branches of government and limiting potential curbs on the incoming president’s power.

The Republican sweep, called by CNN and NBC News on Wednesday, sharply diminishes any hope for Democrats to curtail Trump’s sway over next year’s big fights over trillions of dollars in expiring tax provisions. Trump wants to extend cuts approved during his first term and add new ones he promised on the campaign trail.

Trump’s grip over the so-called Washington trifecta, having earlier won the majority of the Senate, also strengthens the party’s hand to enact immigration controls and reduce regulations on Wall Street and the energy industry.