McCain's divorce

I notice that the on-line news keeps talking about John Edwards affair, and he's no longer in the race for president. But no mention of McCain's divorce of his first wife, although it has been covered in some newspapers. Why do Republicans think it's more moral to divorce a sick or disabled wife to marry a rich younger woman, than to have an affair, but remain with and support your wife and children. Seems twisted to me

http://www.dailymail.co.uk/femail/article-1024927/The-wife-John-McCain-callously-left-behind.html