It's on, baby. Florida's push for an earlier presidential primary has kicked off a challenge from Republican officials Iowa and South Carolina who are calling on the national party to force the Sunshine State to pull back.

If not, Republican leaders in the two states say, Florida should lose the 2012 convention in Tampa.

"Simply put, if Florida does not respect the process by which our primary calendar was set, the RNC should not be bound to the process by which the convention site was selected," Karen Floyd, chairwoman of the South Carolina Republican Party, wrote today to the RNC.

Story here.