Independent Sen. Bernie Sanders said yes recently, though history frowns on challengers. Just ask the late Edward M. Kennedy who failed to knock off Jimmy Carter in 1980 as the former president faced economic troubles and bad polls similar to what Obama is up against.
Pew was out with a poll analysis yesterday that said "32% of Democrats and Democratic-leaning independents say they would like other Democrats to take on Obama for the nomination, while 59% say they would not."
Pew said that Obama is actually in a better situation than Bill Clinton was before his re-election. "Far fewer Democrats want to see Obama challenged for the nomination than supported a primary challenge to Bill Clinton in December 1994. At that time, 66% of Democrats and Democratic leaners wanted to see Clinton challenged, shortly after the GOP won control of Congress for the first time in 40 years."
But who would that challenger be and could they win?
Poll: Which Democrat could beat Obama for the 2012 presidential nomination?
This poll is now closed, but the debate continues in the comments section.