Editor's note: David Frum writes a weekly column for CNN.com. A special assistant to President George W. Bush from 2001 to 2002, he is the author of six books, including "Comeback: Conservatism That Can Win Again," and is the editor of FrumForum. Washington (CNN) -- In this debt-ceiling fight, I'm having horrible flashbacks to the Republican debacle over health care.Then as now, what could have been a negotiated deal turned into all-out political war.Then as now, Republicans rejected all concess...