America is hurtling towards the first nationwide test of its democracy since Donald Trump left the White House and his supporters mounted a deadly insurrection at the US Capitol. The midterm elections on Tuesday will decide control of Congress as well as 36 state governorships – but will also be a referendum on Joe Biden’s presidency, and fire the starting gun for the race to the White House in 2024.
Here’s why the midterms matter for some of the biggest issues facing the US – and the world: