candidate, in my view, you don't understand the political universe we live in today. >> hill: jeff greenfieldwshour weekend special correspondent. thank you, jeff. >> thank you. >> hill: this thursday, january 6, a new two-hour documentary tracing american democracy from the revolutionary war to the 2021 capitol riot and beyond will premiere on pbs stations. "preserving democracy: pursuing a more perfect union” explores the ideals and flaws of democracy and addresses political divides and threats to democracy around the world. >> a nation divided against itself. a republic under siege from within. has the united states ever truly been united? pbs presents "preserving democracy: pursuing a more perfect union,” a two hour documentary special. join us as we explore the evolving story of american democracy past, present, and future. >> hill: the program also looks at the recurring cycles of civil rights progress and backlash in the u.s., shifting voter rights and rules, and the role of teaching civics to foster engaged and informed citizens. here's an excerpt featuring one program that focuses on