Harris to name running mate, launch blitz of US swing states

The US vice president's campaign has come out of the blocks at a lightning pace since she replaced Joe Biden at the top of the Democratic ticket, smashing fundraising records and wiping out the leads built up by Republican rival Donald Trump.

US Vice President Kamala Harris is set to announce her running mate on Tuesday before the pair head out on a five-day swing through America's hottest battleground states. (AFP photo)