Presidential hopefuls Kamala Harris, Donald Trump hit the campaign trail in Michigan

Presidential candidates Kamala Harris and Donald Trump are focusing on the battleground state of Michigan, with each candidate reaching out to undecided voters. NBC\'s Brie Jackson reports. With three weeks left in the presidential campaign, Democrat Kamala Harris is spending most of her days trying to shore up support in the “blue wall” states of Pennsylvania, Michigan and Wisconsin as she tries to avoid a repeat of Hillary Clinton’s collapse there eight years ago. The vice president campaigned at a hockey rink on Monday in Erie, Pennsylvania, where she denounced Republican candidate Donald Trump as “unhinged.” She visited an art gallery in Detroit with actors Don Cheadle, Delroy Lindo and Cornelius Smith. Jr. on Tuesday, then recorded a radio town hall with Charlamagne tha God. On Wednesday, Harris was back in Pennsylvania to stress allegiance to the Constitution as she stood just steps from the banks of the Delaware River, where