Tracy, left, and Rich Griffin, both members of the National Association of Letter Carriers, stop to check their list of registered voters who are members of a union while canvassing for Nevada Sen. ... more 
Tracy, left, and Rich Griffin, both members of the National Association of Letter Carriers, stop to check their list of registered voters who are members of a union while canvassing for Nevada Sen. Harry Reid and Rep. Dina Titus Friday, Oct. 15, 2010, in Las Vegas. The Griffins have taken a leave of absence without pay from their jobs with the U.S. Postal Service to work temporarily for Labor 2010, an AFL-CIO affiliate. Early voting begins Saturday in Nevada. less 
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Associated Press | Photo By Julie Jacobson
Fri, Oct 15, 2010 9:49 PM EDT