This Sunday, tens of thousands of people plan to march on the National Mall in Washington, DC in an effort to persuade Congress and the Obama administration to tackle immigration reform in 2010. More than 700 buses are bringing an estimated 100,000 supporters to the nation’s capital for the March for America. Participants are hoping to show strength in numbers on the ground, and flex muscle on Capitol Hill as well.

Advocacy groups are organizing countless phone banks and Congressional office visits to encourage lawmakers to support a pathway to citizenship for the estimated 12 million undocumented immigrants who live and work in the United States.