Democratic senators are vowing to oppose a funding bill for the Department of Homeland Security following the shooting death of a man in Minnesota. And that opposition increases the prospect of a partial government shutdown by week's end. Six of the 12 annual spending bills for the current budget year have been signed into law. Six more await Senate action. If senators fail to act by midnight Friday, funding for agencies covered under those remaining six bills will lapse. Senate Democratic leader Chuck Schumer says what's happening in Minnesota is “appalling” and he's pledging that Democrats will block a funding package that includes homeland security money.