The New Republic’s John Judis puts the McCain “victory” in perspective:

McCain beat Romney in California–that’s the end of Romney. But McCain continues to depend on moderate, non-evangelical Republicans for his victories. In California, conservatives made up 62 percent of the primary electorate; McCain only won 30 percent of them. In Tennessee, 73 percent of the voters were conservatives; McCain won 22 percent. In Missouri, 65 percent were conservatives; McCain won 25 percent. In these states, McCain failed to win a majority of Republicans. And he might face a revolt of these conservatives in the fall. They won’t vote for a Democrat, but they might not vote at all.

One group that is clearly dissatisfied with McCain are Republican evangelicals. In Tennessee, which Huckabee won, 73 percent of the primary voters described themselves as born-again Christians. McCain won 29 percent of these voters. In Missouri, 54 percent of voters described themselves this way; McCain won 24 percent. The other group that doesn’t like McCain is Republicans who think illegal immigration is the most important issue. In California, 30 percent of the Republicans thought it was; 23 percent voted for Republicans; in Tennessee 25 percent thought it was the most important. Only 21 percent went for McCain. It’s not clear how McCain can win these voters over.

You’ll find the whole thing here.