Trump's veto threat: How far can he block a Democratic Congress?

Democrats are projected to win control of the US House and are close to a Senate majority after the November 3 midterm elections, prompting President Donald Trump to say he will become "Mr Veto" to block their legislation. Under the US Constitution, Trump can reject any bill passed by Congress, though lawmakers can override him with a two-thirds vote in both chambers. Democrats may use fast-track procedures to send him resolutions on issues like war powers and national emergencies, but most bills will face the Senate filibuster. Historically, Congress has overridden only about one in 23 vetoes since 1789. Trump has issued 12 vetoes, with one override, and he has said he expects to make deals with Democrats after an initial period of vetoes.