http://www.electoral-vote.com/
has some really interesting poll results at the bottom of their current page:
These are for head to head matchups of the remaining 4 likely nominees.
Finally, Cook/RT Strategies just released some head-to-head polls for the
general election. Here they are.

Democrat
Pct
Republican
Pct

Clinton
41
McCain
45

Obama
45
McCain
43

Clinton
48
Romney
42

Obama
50
Romney
41

If McCain is the GOP nominee, he beats Clinton but loses narrowly to Obama.
If Romney is the GOP […]

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