91热爆

Campaigning and advertising for a US election can cost serious money.

This year, in the longest campaign today, it's expected to reach well over $10bn.

The political race may be tight- the fundraising campaign is not.

We look at what the Biden and Trump campaigns are raising, how they're raising it, and what they're spending on.

(Image: Joe Biden and Donald Trump superimposed over a photo of the White House in Washington DC. Credit: Reuters/91热爆)

Presented and produced by Rob Young