Another Republican senator is weighing in against a plan hatched by GOP conservatives to tie a new budget deal to defunding the implementation of Obamacare.

"I think it's a silly effort," Bob Corker said on MSNBC. "What people are really saying who are behind that effort is we don't have the courage to roll up our sleeves and deal with real deficit reduction and spending decisions. We want to take ourselves out of the debate and act like we're being principled to the American people..."

Corker (R-Tenn.) added: "I don't look at that as very courageous. I think most of us see through it and realize that these people are really just taking themselves out of the debate."

Other Republicans have offered similar remarks, with Sen. Tom Coburn (R-Okla.), one of the Senate's leading conservatives, distancing himself, and Sen. Richard Burr (R-N.C.) saying it was the "dumbest idea" he had ever heard.

On Sunday, the senator leading the effort, Sen. Mike Lee (R-Utah), suggested the government will continue to be funded no matter what -- appearing to back off threats to shut down the government if Obamacare isn't repealed.