Just prior to Super Tuesday, a Rasmussen poll placed John McCain 6 points ahead of Barack Obama. Republican voters then gave McCain enough Super Tuesday victories to drive Mitt Romney out of the race in the belief that McCain was the more electable. John McCain has always positioned himself as the candidate that could most appeal to moderates and independents.
Now that John McCain is virtually assured of the nomination, the polls have reversed themselves, claiming that Obama is six points ahead of McCain. The earlier poll showing McCain in the lead served its purpose. McCain is nearly certain to be the nominee. Mission accomplished.
The polls can now revert to normal and begin giving Obama the early lead so that the "independents" know which way to follow.
I predicted this result at my blog on January 31st, but I did not anticipate the speed of the reversal.