Well, hardly ever.
Let’s just hope the London Times has this wrong:
Inside John McCain’s campaign the expectation is growing that there will be a popularity boosting pre-election wedding in Alaska between Bristol Palin, 17, and Levi Johnston, 18, her schoolmate and father of her baby. “It would be fantastic,” said a McCain insider. “You would have every TV camera there. The entire country would be watching. It would shut down the race for a week.”

Thanks to KW for the pic!
have they no shame???