Is Ron Paul the only candidate not a mason?

Ron Paul has often been associated with conspiracy theories regarding secret societies, including Freemasonry, but there is no conclusive evidence to confirm that he is the only political candidate not affiliated with such organizations. Many candidates may choose to keep their affiliations private or may not be involved in Freemasonry at all. The membership status of political candidates can vary widely, and it's not typically a topic of public disclosure. Thus, it's essential to verify each candidate's affiliations individually rather than making broad assertions.