Why yes, yes he has. Romney is ignoring the Tea Party. While the other 19 candidates fight for Tea Party votes Romney will waltz through the early open primaries with the solid backing of moderates, independents and democrats. Unless Barry drops out there will not be much of a democrat primary, so they will flood the Republican primaries. He'll lock up the nominatiion without ever winning a clear majority and before most of the closed primary red states even vote.
Add to the above scenario the fact that it's probably seen as Romney's "turn" by a lot of Republicans. The only thing missing is who he'll pick as a running mate. I predict someone from the south, maybe DeMint. Romney knows that he doesn't stand a chance if Republicans from the South reject him based on his religion.
What happens after that is less clear. Hard to say if the voting public prefers their liberals to have a D or an R by their name.
Prepare to be McCained again.
I sincerely hope we're both wrong and someone else manages to capture the nomination.
I don't think Romney will capture the nomination, but I think it's possible. We are potentially looking at a field of 20 candidates. Most voters don't know who most of those candidates are, much less know how to vet them. That's when name recognition becomes so important. The marginal primary voter (IE not political news junkies like on FR) will look at the bewildering list and pick a name they know and vaguely remember something good they heard about them. That's where Romney, Huckabee and Gingrich are scary.