Updated 3:22 p.m ET, 12/9/2013
(CNN) - Republican Sen. Lindsey Graham has decided to sign up for federal health care coverage in the South Carolina exchange, rather than through the Washington, D.C., exchange where he would qualify for a federal subsidy offered to both lawmakers and congressional aides.
"I don't think members of Congress should get a special deal," Graham said in a press release.
"Obamacare is being pushed on the American people and we should live under it just like everyone else," he added.
A CNN survey of lawmakers shows that Graham is not alone: At least ten other senators are signing up through their state exchange windows and rebuffing the thousands of dollars they could get in premium help if they signed up in the D.C. exchange, where their job-related coverage would be triggered.
The majority of them, including Graham, are potentially vulnerable in reelection battles next year, either from the right or the left. That list is: Mark Begich, D-Alaska; Mike Enzi, R-Wyoming; Kay Hagan, D-North Carolina; Mary Landrieu, D-Louisiana; Jeff Merkley, D-Oregon; and Mark Udall, D-Colorado.
One Republican–John Hoeven of North Dakota–-and two Democrats–-Michael Bennet of Colorado and Claire McCaskill of Missouri–-are not up for re-election this year, but are still signing up through their state instead of the congressional exchange window.”
Monday is the final day for lawmakers like Graham to sign up for health coverage through the D.C. health care exchange and for the subsidy that conservatives argue amounts to a taxpayer-funded break that others don't get.
While Republicans have not been as strong in their rhetoric to defund or delay Obamacare as of late, Graham warned that the Republican offensive is still fierce.
"The worst is yet to come, but I will continue my fight to repeal, replace, defund and allow Americans to opt-out of this horrible government program," Graham said.
The two-term South Carolina Senator is up for re-election in 2014.
– CNN Capitol Hill Reporter Lisa Desjardins contributed to this report.