Some public-school districts have refused to say whether they yanked teachers from classrooms for gleefully celebrating Charlie Kirk’s assassination in sick online posts — while a top House GOPer on Friday demanded the educators be investigated. One school district still employs a New York-based math teacher who spewed offensive remarks, said New York Rep. Elise Stefanik — and higher-ups overseeing two Texas districts would not say whether they were booting their educators who ghoulishly...