President Trump has tried to scale back anti-discrimination regulations that date back decades. Federal agencies have heeded his call.When Kenni Miller started as a shift manager in his local Sheetz convenience store in Altoona, Pa., he felt something that he rarely had as a Black man in the workplace.He felt trusted. He felt appreciated. When he was fired a few weeks later, in the summer of 2020 after a background check, Mr. Miller, then 27, was devastated. A nonviolent, felony drug conviction from his teenage years had never caused him to be denied a job before. And he already proved...