No surprise that there’s speculation that former Tampa Police Chief Jane Castor may be prepping for a mayoral run. Castor isn’t saying, of course, but a recent switch in registration to Democrat from life-long Republican certainly fuels the rumor mill. Although the mayoral race is officially non-partisan, it helps a helluva lot to be a registered Dem. Castor’s rationale: The Republican and Democratic parties are not equally embracing of diversity. She hadn’t noticed before?