Midterms live: US voters head to polls to determine control of Congress for Trump’s remaining term

Americans head to the polls on Tuesday to vote in the US midterm elections, with Democrats widely projected to retake control of the House, though the Senate remains up in the air. They will need to gain three seats in the House and four in the Senate to overtake Republicans. Losing either will affect President Donald Trump's ability to pass legislation, and act as a referendum on his second term. Follow our liveblog for the latest updates.

Yesterday's key developments:

• A high-profile Democratic defection shook Michigan's Senate race as Representative Haley Stevens threw her support behind Republican Mike Rogers rather than backing the Democratic candidate, Abdul Al-Sayed, who beat her in the primary race.

• US President Donald Trump chose the backdrop of Washington's Reflecting Pool – a landmark whose botched renovation symbolised the 80-year-old's chaotic second term – to try and rally Republicans against a predicted Democratic win in the midterms.

• The Supreme Court rejected a push for California to set aside 20,000 mail ballots from people President Donald Trump’s administration claims are noncitizens.