Most states use optical scan voting machines, up from just 25 percent of states in 1996. Brad Friedman with Bradblog.com says problems can sometimes be avoided if election officials actually checked the paper ballots with the electronic print out.

Friedman says New Hampshire, which voted in the primaries in early January, failed to match the paper version of the ballot with the electronic version. A phenomenon common in most states. Friedman says California has the highest standards of any state in the country and they only check 1 percent of ballots.

But optic scan machines aren't the only problem. Five states voting in Super Tuesday - Kansas, Arkansas, Tennessee, Georgia and Delaware - use electronic touch screen voting machines. State election officials require no paper trail and no audit which means that once a person votes, that vote lies with the fate of the computer, no back up is offered.

In 2004, 40 percent of voters used these touch screen voting machines. But proof that the system is unreliable has caused a backlash. California, Maryland, Ohio, and Florida are all in the process of banning the machines. States will likely turn to the optical scan voting machines.