Limbaugh

This is from The Daily Kos:

John McCain has a tough decision to make. Will he denounce Rush Limbaugh and the Republican National Committee? Limbaugh for his incredible insensitivity in using the issue of Sarah Palin's son having Down Syndrome to attack Barack Obama, and the RNC for thinking that it had potential.
Conservative radio commentator Rush Limbaugh boosted Alaska Gov. Sarah Palin's pro-life position and mocked Barack Obama on his radio show yesterday with a make-believe riff in which Obama asked Palin "When you found out your baby would be born with Down syndrome, did you consider killing it before or after the due date?"
Limbaugh's "humor" caught the fancy of the Republican National Committee, which, in an internal e-mail, proposed using the bit in a YouTube clip.
The e-mail, which was sent to RNC Communications Director Danny Diaz, and mistakenly to a Tribune reporter, was titled "wow...good YouTube potential..."
Will McCain denounce this? Or is this just another thing that he "can't control"?