To determine what it would take to hack a U.S. election, a team of cybersecurity experts turned to a fictional battleground state called Pennasota and a fictional gubernatorial race between Tom Jefferson and Johnny Adams. It's the year 2007, and the state uses electronic voting machines.

With billions of dollars of support from the federal government, states have replaced outdated voting machines in recent years with optical scan ballot and touch-screen machines. Activists, including prominent computer scientists, have complained for years that these machines are not secure against tampering. But electronic voting machines are also much easier to use for disabled people and those who do not speak English.

Republican Reps. Tom Cole (Okla.) and Thomas M. Davis III (Va.), chairman of the House Government Reform Committee, joined Rep. Rush D. Holt (D-N.J.) in calling for a law that would set strict requirements for electronic voting machines. Howard Schmidt, former chief of security at Microsoft and President Bush's former cybersecurity adviser, also endorsed the Brennan report.