Biden, Obama, Edwards Would Raise Social Security Taxes; HRC Won't Say

On Social Security:

Biden would raise taxes above the first $97,000. So would Edwards, although with a slight variation.

HRC won't say what she'd do -- she doesn't want to negotiate. What's on the table? Off the table? She'd establish a commission. A very cautious answer.

Obama: "I think that lifting the cap is probably going to be the best option." I.e, taxing more than the first $97,000.

Dodd and Richardson won't commit.