After dropping out of the 2020 race and backing his former rival, Vermont Senator Bernie Sanders said he believes the vast majority of his supporters will back Joe Biden in November. Although Sanders acknowledged that "everybody in American knows" how different the two are, he stressed the "choice is pretty clear" when deciding between Biden and President Donald Trump. Sanders spoke to "CBS This Morning" co-host Tony Dokoupil about his endorsement and where he expects Biden to adopt a more progressive stance.