McCain: 775 delegates, Romney has 284, Huckabee has 205. It takes 1,191 to clinch the nomination.
There are 963 left to be chosen, so Romney or Huckabee (piece dated) would have to have all of them -- all of them -- to get to 1,191. Now you can't do that because a majority of those 963 are chosen in proportional primaries, which means you'd have to get 100% if the vote to get them all.
http://calculatedrisk.blogspot.com/ often a good reference site.
"It's virtually impossible for Romney or Huckabee to be the nominee just based on the arithmetic," -Black added. "I see it as virtually impossible. I'm superstitious like my boss, I don't want to say anything's impossible, but it's virtually impossible on the arithmetic."
I was told by a delegate that the phrase Romney has "suspended" his running at the moment, has left a question mark with them on why that specific word was being emphasized. First, concensus was he would be running in the years to come; but the word was used to Maine delegates by the Romney people. Does that mean he could come back in some other way? VP? is the question. All delegates won in Maine are remaining in Romney's hands. They first thought he had withdrawn, but they are now not quite sure what is going on.