Democratic senators are working on a list of demands for changes to U.S. Immigration and Customs Enforcement. Their push comes a partial government shutdown looms by week's end. Democrats are hoping to put pressure on Republicans and the White House as the country reels from the deaths of two people at the hands of federal agents in Minneapolis. Senate Democratic leader Chuck Schumer hasn't outlined what his caucus will ask for before a crucial Thursday vote on spending legislation that funds the Department of Homeland Security and a swath of other government agencies. With no evident negotiations underway, a partial shutdown seems increasingly likely starting Saturday.