After the Democrats' victory in the US, a new era: What can they do, what can't they change?

Democrats are set to take control of both the Senate and House in January after historic midterm gains against Republicans, though their victory does not give them power to easily overturn President Donald Trump’s policies. The party aims to act on issues including corruption investigations, health spending, immigration policy and the Iran war, but Trump’s veto power and Republican political resistance will be the biggest obstacles in the new period. The outcome matters because divided government will constrain legislative change even as Democrats gain investigative leverage. What to watch next is how far Democratic priorities advance once Congress convenes in January and whether veto fights shape the agenda.