As President Donald Trump is sworn in for his second term, Princeton University historian Julian Zelizer joins host Scott Tong to reflect on the events and also look back on other inaugurations ...

Monday marks both the observance of Martin Luther King Jr. day and the inauguration of Donald Trump as our 47th President. We reflect on this with scholars Tressie McMillan Cottom and Eddie Glaude.

"Trump is sui generis," one veteran Republican pollster told ABC News. "He is a unique figure in American politics." ...