India, Oct. 31 -- Americans vote on Tuesday 3 November in midterm elections that will decide who controls the House and Senate for the final two years of Donald Trump's presidency. Every one of the 435 House seats and 35 Senate seats is on the ballot, and governorships are being contested in 36 states. Trump is not a candidate, but the result will determine how much legislative backing he has for the rest of his term.

Democrats need a net gain of three seats to win the House and four to take the Senate. Forecasting models published in the final week favoured Democrats to win the lower chamber, while the Senate is far closer. Nate Silver's model gave Democrats a 95 per cent chance of winning the House and a 75 per cent chance of winning t...