Democrats are projected to win majorities in the House and Senate, according to the source. The source describes the result as a sharp defeat for Republicans in key races across the country.
The source says the outcome ends any chance Trump had of passing partisan legislation in the second half of his term. It also says that actions Trump has taken without Congress, including tariffs, the Iran war and Washington-area construction projects, are likely to face pushback from Democratic majorities.
Trump has said he will use his veto power heavily. In a Fox News interview, he said, "They'll send over things that are insane, and I'll veto them." He also said that after a few months of vetoes, Democrats "will call and they'll say, 'How do we get this stuff done?'" The source notes that Trump's approval ratings have hit record lows in numerous polls.
According to CNBC, House Democrats, expected to be led by Minority Leader Hakeem Jeffries of New York, plan to introduce bills in their first 100 hours. The bills would reinstate enhanced health insurance subsidies that expired under the GOP-held Congress, reverse Medicaid cuts Trump signed earlier this year, undo Trump's tariffs, and hold votes on ending the war in Iran. The source says Democrats would lack the two-thirds majorities needed to override a veto without Republican help, and Senate Democrats would fall short of the 60 votes needed to overcome a filibuster for most legislation.
The source also reports that Democrats plan investigations. Rep. Robert Garcia, D-Calif., who is likely to chair the House Oversight Committee, said his panel will target the Trump family's business dealings, corporate corruption and alleged abuses by federal immigration agencies, as well as the administration's handling of files related to Jeffrey Epstein. Garcia summed up his plans on election night with the words "Lawyer up." Sen. Ed Markey, D-Mass., said Democrats would be "printing" subpoenas.