Eighteen Democratic U.S. Senators and senators-elect sent a letter to Senate Majority Leader Harry Reid last week calling for a “delay in the implementation” of the medical device tax in Obamacare, the Wall Street Journal reports.

The provision was an integral part of the version of the Obamacare law, which was passed in the Senate under Reid’s stewardship in 2009. It is set to take effect on January 1, 2013.

An effort to repeal the provision failed in Congress in June. At the time, Reid characterized the proposed repeal as a Republican attack on Obamacare.