Alexandra Kernan-Schloss waited in line for 11 hours in 2004 to vote near her school, Kenyon College, in Gambier, Ohio. With just two voting booths at the polling place, she wasn't able to cast her first-ever presidential ballot until 3 a.m. -- after news of her candidate's defeat had been widely reported. The young Democrat was deflated but determined to get more involved. Now a senior at George Mason University, she has dedicated recent months to registering her peers, advising them about how and where to vote, and getting them pumped up about turning out on Tuesday.

"Ohio was lost," said Kernan-Schloss, a Barack Obama supporter, before heading out for a door-knocking expedition on a cool fall evening. "Virginia won't be lost this time. You can see the difference that we're making." Kernan-Schloss is one of thousands of young people across the country who are volunteering in the waning days of the presidential campaign to help get out the vote. Hers is a new generation of activists, wooed to the fight for the White House by way of Facebook and Twitter. Text messages keep them in the loop. Technology has facilitated their participation and hooked many of them on politics.

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