CHICAGO (AP) — Chicago has again bolstered its sanctuary policies as aldermen approved a plan requiring police to document any requests for assistance from federal immigration agents. But immigrant rights activists say the measure falls short of what Mayor Lori Lightfoot has promised. While the city has limited cooperation between police and federal immigration agents for years, it’s still allowed in some circumstances. Immigrant rights activists say those loopholes need to be closed. Lightfoot has said doing so could jeopardize the city’s lawsuit against President Donald Trump’s administration, which withheld federal public safety grants from sanctuary cities including Chicago.