Rallies unfold in cities across the U.S. against U.S. 's new immigration . U.S. Rep. Gutierrez , D-Illinois , was arrested during a rally in Arizona . Luis Gutierrez and others were protesting outside the White House on a rallying day . CNN 's Susan Candiotti , Ted Rowlands , Ione Molinares and Casey Wian contributed to this report . About 1,000 people gathered in New York City 's Union Square on Saturday afternoon .
Rallies unfold in cities across the U.S. against U.S. 's new immigration . U.S. Rep. Gutierrez , D-Illinois , was arrested during a rally in Arizona . Luis Gutierrez and others were protesting outside the White House on a rallying day . About 1,000 people gathered in New York City 's Union Square on Saturday afternoon .