Is a Biden-Trump rematch a sure thing?

The Iowa caucuses last week marked the official start of the US election season. But a lot can happen between now and November 5, when American voters head to the polls. Nick Harper joins Teresa Tang with a look at the issues, the hopefuls and the possible roadblocks candidates will face heading to the White House.  See omnystudio.com/listener (https://omnystudio.com/listener) for privacy information.