Rick Santorum, Republican candidate for president, debates with Rachel Maddow about the Constitutional role of the Supreme Court in the United States government, and expresses his regret for his now infamous use of "man on dog" in arguing against gay marriage.July 23, 2015
UP NEXT
Panicking Trump coming up short for civil fraud penalty; no friends stepping up as deadline nears
07:18
Putin flexes expansionist muscles as GOP stalling starves Ukraine of military aid
04:25
How pro-Trump election officials could make sure your vote doesn't count
08:19
How Russia duped two Republicans with propaganda laundered through fake news sites
03:54
'Massive national security risk': Trump financial desperation makes access to U.S. secrets dangerous
04:22
'Everything's for sale': Trump's TikTok flip-flop follows disturbing pattern