Trey Grayson, Kentucky’s Republican secretary of State, raised $603,000 in this year’s second quarter for a potential 2010 Senate campaign, even though Republican incumbent Jim Bunning says he still plans to seek re-election.

According to my analysis of Grayson’s report (one of the few to be on file today in the Senate Office of Public Records ahead of tonight’s deadline), elected officials were among the donors to his “exploratory” campaign. They included state Reps. Scott Brinkman, Brent Housman and Alecia Webb-Edgington.

Other elected officials who gave to Grayson’s effort included K.C. Crosbie, a councilwoman in Lexington, and Hal Heiner, a councilman in Louisville.