More on the Cross in the dirt

And I think Sullivan nails it

Many readers have noted that versions of this story - attributed to Solzhenitsyn by Chuck Colson - have been a staple of evangelical sermons for a very long time. They aren't always attributed to Solzhenitsyn, but this sermon, preached by Father Luke Veronis, is a classic of the genre. It's a trope, a kind of urban legend in evangelical circles - and, of course, rooted in deep spiritual truth. Used in a sermon as a way to talk about Christ's redeeming power is one thing. Actually saying it happened to you in a specific place and time is another.
And of course, none of this would be salient were it not for the obvious motive for coopting the story. McCain has never been a very devout man. He doesn't come across that way in his first account of the story; and he doesn't come across that way now. But as the Christianists took over the GOP, he must have understood that this was a problem - especially against Bush in 2000. So in 1999, the story, already poignant and true in its particulars, changes into a much more grandiloquent and sectarian affair, echoing deep evangelical themes and tropes.
And it would not be salient if McCain hadn't deployed the anecdote in his own words - with a misleading image - in a campaign ad, and used it again in front of an evangelical audience Saturday night. And it would not be salient if religious fanatics had not a strangle-hold on the Republican party, seeking doctrinal assurances and echoes of their own type of faith in political candidates.