Fairfax County Supervisor Pat Herrity said he will seek the Republican nomination to challenge 11th District Rep. Gerry Connolly in the November election.

His candidacy, which will be formally announced Wednesday, sets up a Republican primary battle with Keith Fimian, a conservative businessman who unsuccessfully opposed Connolly in 2008. The victor will take on a well-known freshman Democrat in a politically diverse district, one that had been represented by a Republican for the 14 years before Connolly’s arrival.