Sen. Bernie Sanders will not support a "sham" amendment to the Republican healthcare bill dismantling Obamacare that would implement a single-payer healthcare insurance program.

On Wednesday, Sen. Steve Daines, R-Mont., who does not support single-payer, proposed the amendment as a way of cornering vulnerable Democrats seeking re-election to go on record for the progressive platform.

Not all Democrats have voiced support for it, but progressives like Sanders, I-Vt., have long called for a single-payer, government-run system. However, Sanders' office said he will not play Daines' game.

"The Democratic caucus will not participate in the Republicans' sham process. No amendment will get a vote until we see the final legislation and know what bill we are amending," Josh Miller-Lewis, a spokesperson for Sanders, said in a text sent to Vox.

Miller-Lewis added, "Once Republicans show us their final bill, Sen. Sanders looks forward to getting a vote on his amendment that makes clear the Senate believes that the United States must join every major country and guarantee health care as a right, not a privilege."

Daines' single-payer amendment is a rip of legislation offered in the House by Rep. John Conyers, D-Mich., which has the support of more than 100 Democratic co-sponsors, calling for a "Medicare for All" program.