GOP presidential candidate Rick Santorum (Pic by Gage Skidmore, via Wikimedia Commons) This weekend’s Florida Tea Party Convention failed to draw many of the GOP candidates invited to participate: Out of the eight GOP presidential candidates, only Rick Santorum showed up to speak. Convention organizers invited a slew of speakers to talk about tea party-favored topics, such as Agenda 21 and the supposed “radicalization of Islam” in the U.S., and had scheduled a discussion among GOP presidential candidates.