When Barack Obama was campaigning for president in 2008, he declared that marriage is between a man and a woman. For the most part, his position was treated as a nonissue.
Now Rick Santorum is campaigning for president. He too says that marriage is between a man and a woman. What a different reaction he gets.
There’s no mystery why. Mr. Santorum is attacked because everyone understands that he means what he says.
President Obama, by contrast, gets a pass because everyone understands—nudge nudge, wink wink—that he’s not telling the truth. The press understands that this is just one of those things a Democratic candidate has to say so he doesn’t rile up the great unwashed.