Former Pennsylvania Rep. Patrick J. Toomey announced Monday that he is stepping down as president of The Club for Growth, a conservative political organization he has headed for the past four years.

Toomey’s move appears the latest signal that he intends to seek a 2010 rematch of his close 2004 primary loss to Sen. Arlen Specter, a prominent Republican centrist who is gearing up to bid for a sixth term.

Chris Chocola, a Republican who represented Indiana’s 2nd District in the U.S. House from 2003 to 2007, is succeeding Toomey as Club for Growth president.