MADISON, Wis. — A southeastern Wisconsin city braced for another round of protests as prosecutors prepared to announce whether they’ll charge a white police officer who shot a Black man in the back, leaving him paralyzed.Kenosha Police Officer Rusten Sheskey shot Jacob Blake seven times on Aug. 23 as Blake was about to get into an SUV during a domestic dispute. The police union has maintained Blake resisted arrest and was armed with a knife, although state investigators have said only that a knife was found on the floor of …