President Joe Biden and Republican Donald Trump are poised to have the biggest day of the primary campaign move them to the brink of winning their party's presidential nominations and setting up a historic rematch. Voting is taking place in 16 states and one territory. Hundreds of delegates are at stake, the biggest haul for either party on a single day. Catawba College political science professor Michael Bitzer joined Jeff Hamlin on the WPTF Afternoon News to discuss the national impact of Super Tuesday.