(CNN) - Florida's Republican gubernatorial primary keeps getting hotter.
Former health care executive Rick Scott released an ad Tuesday tying his opponent, Florida Attorney Gen. Bill McCollum, to the disgraced former chairman of the state's Republican Party.
"Party Boss Jim Greer - arrested for money laundering," the ad begins. "And who backed Jim Greer's effort to hide financial irregularities? Bill McCollum."
Scott has criticized McCollum for what he says is the attorney general's unwillingness to call for the release of the state Republican Party's documents.
On Tuesday night, the Republican Governors Association, which has not endorsed either candidate, condemned Scott's ad and called for him to "pull this ad and move forward in the primary in a constructive manner."
Both the RGA and McCollum's campaign point out that as attorney general, McCollum took action that led to Greer's arrest.
"Floridians will see right through Rick Scott for the fraud that he is," McCollum campaign manager Matt Williams said in a statement.
The race between the two conservatives has tightened in the lead-up to the state's August 24 primaries. Recent polls have shown each candidate holding a razor thin lead over the other.