President Obama, in web video to grassroots supporters today: "This year, the stakes are higher than ever. It will be up to each of you to make sure that young people, African Americans, Latinos and women who powered our victory in 2008 stand together once again."

Gallup: "Younger voters remain less enthusiastic about voting in this year's midterm elections than those who are older, underscoring the challenge facing the Democratic Party in its efforts to re-energize these voters, who helped President Obama win the presidency in 2008."

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