Secretary of State Ken Blackwell says a company reviewing voting machine security had a financial interest in one of the machine makers. Blackwell decided to drop Science Applications International Corporation after learning of the conflict. The company had a business relationship with Hart Intercivic, one of four vendors qualified to sell voting machines to Ohio counties. SAIC, a research and engineering firm, was to share the job of reviewing the firms' machines and software. The review was to identify security weaknesses that might jeopardize the integrity of next year's presidential election. Ohio and other states are replacing their punch card voting machines in the wake of problems in the 2000 presidential election.