Mike McGavick, Republican Senate candidate from Washington, is being mighty slippery about phasing out Social Security:

Social Security benefits must be maintained for current retirees and those near retirement. I support examining phasing in voluntary personal accounts for younger workers to both ensure the long term future of the program and to help create more ownership over individual retirement. I do not support privatization—Social Security must remain a government program.

In other words, he does support privatization (i.e., "voluntary personal accounts for younger workers") but he's not prepared to admit it. Nor is he prepared to take responsibility for his views:

It’s time that we move Social Security reform—so long bogged down in political gamesmanship—to a more thoughtful and productive place. I propose the creation of a commission, like the Base Realignment and Closure Commission, which makes decisions about the closure of military facilities, be enacted for Social Security reform to remove the partisanship and create results on this crucial issue.

In other words, vote McGavick and he'll try to get an unaccountable commision to phase Social Security out, but one way or another he won't be up front about what he's doing.