Our exploration of non-citizen voting in the 2008 presidential election found that most non-citizens did not register or vote in 2008, but some did. The proportion of non-citizens who voted was less than fifteen percent, but significantly greater than zero. Similarly in 2010 we found that more than three percent of non-citizens reported voting.
These results speak to both sides of the debate concerning non-citizen enfranchisement. They support the claims made by some anti-immigration organizations that non-citizens participate in U.S. elections. In addition, the analysis suggests that non-citizens' votes have changed significant election outcomes including the assignment of North Carolina's 2008 electoral votes, and the pivotal Minnesota Senate victory of Democrat Al Franken in 2008.