Ex-Sen. Tom Coburn, conservative political maverick, dies

Former U.S. Sen. Tom Coburn was stubborn as a mule and conservative to his core. Coburn, who died early Saturday at age 72, joined the U.S. Senate the same year as President Barack Obama, and the pair became fast friends despite their contrasting ideologies. In Oklahoma, where Obama failed to carry a single county in his 2008 presidential bid, voters took note.