It all has to do with W. Virginia's primary process. After the first round of balloting, the weakest performers drop out (in this case, John McCain and Ron Paul). Their supporters then vote again among the remaining contestants (Mike Huckabee and Mitt Romney).
If you look at the numbers in the article, virtually 100% of McCain's supporters backed Huckabee in the end. Far to many for it to be a coincidence.
Marc Ambinder of The Atlantic reported Tuesday that, after the first ballot, McCain’s campaign called his supporters there and urged them to vote in favor of Huckabee.
“Unfortunately, this is what Senator McCain’s inside Washington ways look like: he cut a backroom deal with the tax-and-spend candidate he thought could best stop Governor Romney’s campaign of conservative change,” Beth Myers, Romney’s campaign manager, said in a statement.
If antics like this are what cause McCain to win the primaries, then the Republican Party truly will have destroyed itself.