Did Rush Limbaugh Tilt Result In Indiana?

http://www.washingtonpost.com/wp-dyn/content/article/2008/05/07/AR2008050703932.html?hpid=topnews

"Limbaugh called off the operation yesterday, saying he wants Obama to be the party's pick, because "I now believe he would be the weakest of the Democrat nominees."

He added: "He can get effete snobs, he can get wealthy academics, he can get the young, and he can get the black vote, but Democrats do not win with that."

In addition to the unions, I thought that's exactly what the Democrat party won with nationally since they lost the South as a bloc...?