[CBS Predicts: Democrats Poised for Largest House Majority in Nearly 20 Years] According to a report by Grunting, CBS News predicts that Democrats have won control of the U.S. House of Representatives, ending Republican control of both houses of Congress since the start of Trump's second term. CBS News' election analysis predicts that Democrats are poised for their largest House majority in nearly 20 years. With renewed control, Democrats will be able to dominate congressional committee investigations, conduct oversight of the government, and block some of Trump's legislative agenda.