Poll: Many Americans Don't Know Biden

Delaware Senator and Democratic presidential candidate Joe Biden may have been in Congress since 1972, but three quarters of registered voters say they don't have either a favorable or unfavorable opinion of him, a new CBS News poll finds.

Fifty-six percent of registered voters say they haven't heard enough about Biden to form an opinion. Nine percent say they have a favorable view of the candidate, while 15 percent say they have an unfavorable view. Nineteen percent are undecided.

Biden's long tenure in Congress isn't hurting him: few Democratic primary voters say they're actively looking for a nominee from outside the beltway. Twenty-eight percent of Democratic primary voters prefer a nominee with experience from inside Washington, compared to 18 percent that prefer a nominee with experience outside the nation's capital. Forty-nine percent say it doesn't matter.

Biden, the chairman of the Senate Foreign Relations Committee, has discussed the idea of de-centralizing the Iraqi government and separating Iraq into three distinct regions. Asked about that idea in general, most Democratic primary voters (as well as nearly half of all voters) favor it. Fifty-two percent of Democratic primary voters favor separating Iraq into three parts, while 37 percent favor keeping Iraq under one government.

To see the full poll results, click here.