It doesn't even matter which ones are running, in fact. Check out these numbers from the most recent Democracy Corps poll of 1002 people over March 15-21 (MoE +/- 3.1%).

I know it is far ahead, but thinking about the 2008 election for president, if the election for president were held today and the candidates were Democrat Hillary Clinton and Republican Jeb Bush, for whom would you vote -- Democrat Hillary Clinton or Republican Jeb Bush?

Democrat Hillary Clinton 49
Lean Democrat Hillary Clinton 1
Republican Jeb Bush 46
Lean Republican Jeb Bush 1
(Other candidate) 2
Lean (Other candidate) -
(Undecided) 1
(Refused) 1

Total Democrat Hillary Clinton 50
Total Republican Jeb Bush 47
Total (Other candidate) 2

Now I'd like you to imagine that the Constitution is changed and there is no limit on the number of terms a President can serve. Thinking about the 2008 election for president, if the election for president were held today and the candidates were Democrat Bill Clinton and Republican George W. Bush, for whom would you vote -- Democrat Bill Clinton or Republican George W. Bush?

Democrat Bill Clinton 50
Lean Democrat Bill Clinton 1
Republican George W. Bush 45
Lean Republican George W. Bush 1
(Other candidate) 3
Lean (Other candidate) -
(Undecided) -
(Refused) 0

Total Democrat Bill Clinton 51
Total Republican George W. Bush 46
Total (Other candidate 3

Maybe the blogosphere shouldn't fear a run by Hillary after all...