Hillary's Advantage

Gallup did a little research to see if Hillary is right. In the 20 states that she won this primary season, she beats John McCain 50% to 43%.
In those same states, Barack Obama is about tied with McCain among national registered voters, 45% to 46%.
On the other hand, Clinton does just as well against McCain in the states that Barack beat her:
...in the 28 states and the District of Columbia where Obama has won a higher share of the popular vote against Clinton in the 2008 Democratic primaries and caucuses, there is essentially no difference in how Obama and Clinton each fare against McCain. Both Democrats are statistically tied with him for the fall election.
Who would you nominate. And if you're Barack, who would you select as your VP?