Hillary Clinton has received a standing ovation and praised presidential nominee Kamala Harris at the Democratic National Convention.

She said they had both put "cracks in the glass ceiling" for women, and that she wished both their mothers could have seen them now.

Democrats are trying to harness a swell in political momentum during their national convention in Chicago.

Harris has surged in polls against Donald Trump since she stepped up to replace Joe Biden, though the race is still a tight one.