Finally, automatic voter registration is good politics for the Democratic Party. "Among eligible voters, some 30% of African Americans, 40% of Hispanics, 45% of Asian Americans and 41% of young adults (age 18-24) were not registered to vote in the historic 2008 election," according to the progressive think tank Demos.
These are constituencies that lean Democratic. Unregistered voters would have favored President Obama over Mitt Romney by 73% to 27% if they had voted, according to the American National Election Studies.
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