emanuel. his city today taking action against new federal regulations governing sanctiuary city. his city claiming the new rules are unauthorized and unconstitutional. the attorney general announced in late july that cities must agree to let federal immigration agents access local jails and give 48 hours notice before releasing certain people that the federal government might have their eye on. if they don't comply, those cities could lose millions in federal grant money. msnbc's mar anna aturns ois following this story. give us some context and some reaction. what are you hearing? >> chris, in chicago specifically, local lawmakers, immigrant organizations, are praising this latest lawsuit by rahm emanuel, saying it is a step in the right direction toward, quote, protecting our immigrant communities. there is a lot of fear on the ground over the undocumented population. i just got off the phone with a district where 40% of the population is undocumented and he says he's already seeing that