Protests have been held in a number of U.S. cities over the Obama administration’s expansion of the controversial immigration enforcement program known as Secure Communities. On Tuesday, several dozen Latino activists delivered a petition to President Obama’s campaign headquarters in Chicago. In other protests, some 200 activists walked out of hearing in Los Angeles called by a task force advising the enforcement program. Demonstrations were also held at Democratic Party offices in Miami, Atlanta, Houston and Charlotte, North Carolina. Secure Communities requires local police to forward fingerprints of every person they arrest to the U.S. Department of Homeland Security. In recent months, the governors of Illinois, Massachusetts and New York have pulled out of the program. But earlier this month, federal officials announced the program is not voluntary and that local governments cannot withdraw.