Thousands of attorneys and support staffers have agreed to aid in the effort, providing a mass of legal support that appears to be unrivaled by Republicans or precedent. Obama’s campaign says it is particularly concerned about the implementation of new voter ID laws across the country, the possibility of anti-fraud activists challenging legitimate voters and the handling of voter registrations in the most competitive states.

Republicans are building their own legal teams for the election. They say they’re focused on preventing fraud — making sure people don’t vote unless they’re eligible — rather than turning away qualified voters.

Since the disputed 2000 presidential election, both parties have increasingly concentrated on building legal teams — including high-priced lawyers who are well-known in political circles — for the Election Day run-up. The Bush-Gore election demonstrated to both sides the importance of every vote and the fact that the rules for voting and counting might actually determine the outcome. The Florida count in 2000 was decided by just 537 votes and ultimately landed in the Supreme Court.