Swing stage of Michigan key in determining the next US President with campaigners targeting undecided voters

The US state of Michigan is one of a handful of battleground states that will determine who will be the next American president. This swing state has been won by Donald Trump in 2016, and Joe Biden in 2020, and now the Democrats are hoping Kamala Harris' late injection into the race will give them the boost they need to win in November. Stephanie March from Foreign Correspondent has just returned from Michigan – here's part of tonight's story.