If Obama is so vulnerable in 2012,why do no potential candidates beat him in polls ?

the right has been crying about him being a socialist,a Muslim, not a US citizen, a marxist, etc. and yet they have no one that can beat him. Where is your candidate ? If the guy is so weak you should have people cawing over one another for a shot at the White House. Instead you have a bunch of timid little girls who are uncommitted. Oh well Bachamn is interested in running i think. HAHAHAHA.