Nineteen conservative activists have signed a letter to Republican leaders in Congress urging the body to fight to delay all of the provisions of Obamacare set to go into effect in 2014. (Update: the number of signatories has increased to 33.)

“[W]e the undersigned urge you to insist on, at minimum as part of any final deal, a one-year delay of all 2014 provisions (including mandates, subsidies, and taxes) in the upcoming CR and in fiscal negotiations with the White House,” write the members of the Repeal Coalition, which includes Grover Norquist of Americans for Tax Reform, Phil Kerpen of American Commitment, Heather Higgins of Independent Women’s Voice, and several others. The letter is addressed to both House speaker John Boehner and Senate minority leader Mitch McConnell.