VP choice Kamala Harris joins Biden in first joint campaign

Democratic US presidential candidate Joe Biden and his newly chosen running mate Kamala Harris campaigned together for the first time today.

The former primary rivals sought to solidify their advantage over President Donald Trump.

Biden embraced the significance of naming the first Black woman to a major party's presidential ticket, saying representation matters.

Biden says Harris is the right woman to help him defeat Trump and then lead a nation facing crises in triplicate, a pandemic, wounded economy and systemic racism.

Biden says it's no surprise President Donald Trump is already attacking Harris.

The pair make history, with Harris the first Black woman on a national major party ticket.

She would also be the first woman to hold national executive office if Biden wins.