...and the most popular Republican in the country, Colin Powell, thinks Obama would be better on foreign policy.
Maybe the most popular Republican amongst Democrats. But I assure you, he is not so beloved by the GOP anymore (endorsing a Democrat for President tends to do that).
I'd guess Hillary and Powell are the most popular nationally? Not sure who the most popular Republican among Republicans is. Palin or Christie maybe?
Excluding members of the Bush 43 administration... Bush 41, Romney, (theoretically political) David Patreus, Potentially Romney's VP pick, And then the 25 young/new stars.