Chester County Republicans, who once outnumbered county Democrats 2-1, will vote Tuesday evening on a slate of candidates vying for the party's endorsement, a designation historically equated with victory in November.
In recent years, the gap in registration has diminished. At the end of January, county records showed 140,005 registered Republicans, 123,232 Democrats, and 55,192 other voters.
Joseph E. "Skip" Brion, the party chairman, said the Republican numbers had recently started to rebound.
Candidates will earn endorsement if they garner 60 percent of the votes of the committee people at the nominating convention Tuesday evening. If, after three ballots, no winner has been determined, the party will recommend the two top candidates and "let the voters decide," Brion said.