and also, joe lieberman's life in the senate and american politics is also kind of a microcosm of regional and ideological changes within the democratic party. so he arrives in washington 1989 as a quiet centrist democrat, replacing a brash liberal republican. he is an early advocate of bill clinton and a strong supporter of the clinton and ministrations politics, but he breaks with bill clinton memorably over monica lewinsky and extramarital affair there. he doesn't vote to impeach -- >> norah: rebukes them -- >> reporter: rebukes them, and that stings purely also get the attention of al gore and becomes his running mate in 2000. as he continues his political career he becomes more and more estranged from the democrat party. fierce advocate of. the iraq war. 2004, progressive democrats give him no traction whatsoever. 2006 defeated for reelection by democrat runs as an independent and wins. but in 2,000 -- december 2007, he endorses john mccain. completing his estrangement from the democratic party. so in that sense, this centrist democrat finds himself more and more alienated from the de