Harris and Walz hold first rally together as new Democratic ticket

Tim Walz touted his rural roots and said Donald Trump would take the US "backwards" as he appeared for the first time as Kamala Harris’s running mate at a raucous Democratic Party rally.

At the event in Philadelphia on Tuesday night, the party’s new nominee for vice-president said their Republican rivals in November's election were "weird as hell".

The Minnesota governor spoke in front of thousands of supporters just hours after he was announced as Ms Harris’s pick for the role.

The Trump campaign, meanwhile, was quick to attack Mr Walz as a "dangerously liberal extremist".