Florida Agriculture Commissioner Adam Putnam is running for re-election.
Putnam, a former member of Congress, last month quietly opened a campaign account for the 2014 election. He made no formal announcement at the time.
The move should end any lingering questions that Putnam may mount a primary challenge to incumbent Gov. Rick Scott.
Putnam, a Republican, was harshly critical of Scott for supporting the expansion of Medicaid to roughly 1 million Floridians. The expansion is a key component of the federal health care overhaul.
The Florida Legislature during its annual session rejected the idea of expanding Medicaid.
The relationship between Putnam and Scott has been strained. Scott has been skeptical about some of Putnam's legislative initiatives and nearly vetoed bills backed by the agriculture commissioner.