Tim Walz accepts the VP nomination as Kamala Harris prepares to take centre stage at the Democratic National Convention.

America’s campaign conventions are a cross between political rally, theatre and rock concert, where the parties tell the story of their leading candidates.

All week long they’ve completed the puzzle that is Kamala Harris: who she is, where she comes from, what she’s done and what she can offer America.

Always drawing the comparison with Trump, and offering up an alternative message of joy and freedom.

Now it’s her turn to take centre stage, a night after her running-mate Tim Walz drew on his past as a football coach to rally Democrats with a locker room pep talk