In order to repeal health care reform, its opponents would need either a majority in Congress and a Republican president, or a veto-proof majority, neither of which is likely in the next few years.
Several Republicans, however, have vowed to try to repeal the legislation -- or at least run on repeal. But even Senate Minority Leader Mitch McConnell, who says his party's slogan will be "Repeal and Replace," won't say they'll actually try to undo the legislation.
But Corker, at least, seems to be nipping the notion in the bud.
Late update (4/2/2010): Corker now backtracks, saying he meant repeal won't happen before 2012.