Throughout the 2020 Democratic presidential campaign, the topic du jour has been healthcare.

Both Sens. Elizabeth Warren and Bernie Sanders support "Medicare For All" and want to put an end to private insurance. Meanwhile, Pete Buttigieg, Amy Klobuchar, Tom Steyer, Michael Bloomberg and Joe Biden have all come out in favor of public option in addition to private insurance.

WGBH News Political Reporter Adam Reilly explained the differences Monday night on Greater Boston.