In 2004, election integrity activists challenged the results of Ohio's presidential election before the Ohio Supreme Court, and convinced Rep. Stephanie Tubbs-Jones (D-OH) and Sen. Barbara Boxer (D-CA) to challenge the state's Electoral College vote before a joint session of Congress. The reaction by Ohio's then Republican-controlled Legislature was to enact a series of election reforms that punished likely Democratic voters. Some of the laws adopted were later thrown out in court, such as penalizing voter registration drives. But others, including a technical process to require certain voters to prove their registrations are valid on Election Day -- or lose their right to vote, remain in effect. Two of the nation's top voting rights groups, Advancement Project and Project Vote, this week reported 600,000 Ohio voters could be effected.