SUMMERVILLE The incumbents and a veteran school principal were holding leads in early returns for the Dorchester District 2 School Board.

Vote totals were delayed until late Tuesday by computer problems at the county elections board.

Incumbents Barbara Crosby and Lisa Tupper were joined by Sam Clark with at least 18 percent of the vote. The closest challenger was former school board member Harry Blake, with 16 percent.

Seven candidates ran for three at-large seats on the school board. The race was non-partisan.

The election had seemed to bode some changes on the board, with former Chairman Bo Blanton stepping down.

The individual races were overshadowed by the biggest controversy in the district, the $180 million bond referendum to build and renovate schools.

But the referendum passed and all the candidates supported it. They differed on where the district should put its focus in accommodating student needs.

Crosby, Tupper and Clark each stressed doing more to improve graduation rates.

So did candidate Louis L. Smith, who had received only about 5 percent of the vote, and David Dubose, who had drawn 12 percent.

Candidate Justin Farnsworth, who called for better planning for growth, had received 11 percent. The successful district has been overwhelmed by the year-to-year increase in the number of students.

The election winners will serve four-year terms on the seven-person board. The district encompasses schools in the lower part of the county around Summerville.

Reach Bo Petersen at 937-5744, @bopete on Twitter or Bo Petersen Reporting on Facebook.