There are only two reasons why McCain was able to acquire the nomination. The first is that conservatives could not (or would not) rally and unite behind anyone. The second is the open primaries in several key states. McCain essentially backed into the nomination, winning it almost by default. He wasn't effectively beginning his campaign in February. He was resuscitating it.
McCain had been running for president since the late 1990's. He had everything in place except a real constituency in the Republican Party. His constituency, such as it was, was among independents, centrist Dems and lukewarm Reps. Conservatives were not going to support Romney. When Huckabee and everyone else dropped out, who was left?
McCain was the darling/choice of the new world order (Bush1) and its enablers including the msm and the owners.