In one of the few seats likely to flip to the Democratic column in November, conservative real estate developer Glen Urquhart holds a razor-thin lead over Michele Rollins for the Republican nomination in the contest to replace Rep. Mike Castle (R) in November.

With all precincts reporting, the Associated Press reported that Urquhart leads Rollins 48.6 percent to 47.7 percent. Officially, the AP had not called the race.

Either candidate will start as an underdog against the Democratic candidate, former Lt. Gov. John Carney, although the local GOP establishment largely believes Rollins is the stronger candidate.