Demonstrators rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

Protesters march in a May Day demonstration May 1, 2009 in Chicago, Illinois. The march had been threatened with cancellation over concerns about the risks associated with the recent outbreak of swine flu. (Photo by Scott Olson/Getty Images)

Ana Martinez (L) and Willy Jauegui wear masks for protection against exposure to the swine flu virus, H1-N1, as demonstrators rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

Sierra Ventura wears a mask for protection against exposure to the swine flu virus, H1-N1, as demonstrators rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

Trujillo Guiermo wears a mask for protection against exposure to the swine flu virus, H1-N1, as demonstrators rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

A man wears a mask protesting the deportation of undocumented immigrants to Mexico where the swine flu virus, H1-N1, has killed many and sickened thousands of people as demonstrators rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

A man wears a President Barack Obama mask and shakes the hands of demonstrators at a rally before marching for immigrant worker rights on May Day on May 1, 2009 in Los Angeles, California. Thousands of people are participating in seven May Day immigrant rights protest marches throughout the Los Angeles area. At the 2007 May Day marches, demonstrators and bystanders were beaten by Los Angeles police officers at MacArthur Park resulting in a $12.85 million payout by the city to settle nine lawsuits this year as Los Angeles struggles with its faltering economy. In a breakdown of political unity, activists groups are holding marches independently of one another this year. (Photo by David McNew/Getty Images)

Enrique Perez (R) of Germantown, Maryland, wears a mask as he holds sign with other members of the National Capital Immigrant Coalition as they gather at Malcolm X Park prior to a march for May Day to the White House May 1, 2009 in Washington, DC. The activists called on the White House and the Congress to commit to a comprehensive immigration reform. (Photo by Alex Wong/Getty Images)

Three-year-old Peter Araiza prepares to march with his father Francisco in a May Day demonstration May 1, 2009 in Chicago, Illinois. The march had been threatened with cancellation over concerns about the risks associated with the recent outbreak of swine flu. (Photo by Scott Olson/Getty Images)

Supporters hold a banner made up of national flags as they gather in Union Park for a rally calling for the legalization of more than 12 million undocumented immigrant workers Friday, May 1, 2009, in Chicago. (AP Photo/M. Spencer Green