CNN has canceled the GOP primary debate slated for March 1, as Mitt Romney and Ron Paul opted not to participate.

“Without full participation of all four candidates, CNN will not move forward with the Super Tuesday debate. However, next week, CNN and the Arizona Republican Party will host all four leading contenders for the GOP nomination. That debate will be held in Mesa, Arizona on February 22 and will be moderated by CNN’s John King” the network said in a statement to Politico’s Dylan Byers.

It is unlikely that all of the debates currently on the schedule will happen, even if multiple candidates hang on going into the Republican National Convention. The next slated debate is March 19, and will be hosted by PBS. debate