milwaukee county sheriff david clarke african-american become staunch critic black live matter movement supporter donald trump presidential campaign withdraw acceptance job assistant secretary department homeland security u.s. newspapers report saturday clarke notify secretary homeland security john kelly friday decision craig peterson adviser clarke say statement accord washington post newspapers sheriff clarke 100 percent commit success president trump believe skills could good utilize promote president agenda aggressive role newspapers quote peterson say neither agency clarke office immediately respond request comment clarke decision come month tell radio station wisn milwaukee would leave post sheriff june join department homeland security time spokeswoman agency say announcement clarke make president trump clarke meet wisconsin tuesday discuss roles clarke could help advance trump agenda washington post report cite peterson department homeland security create sept. 11 2001 attack new york pentagon include agencies handle customs border protection immigration coast guard transportation security administration secret service clarke come fire comment make black live matter movement grow protest number police kill unarm black men various part unite state clarke label members movement subhuman creep call eradication clarke speak support trump republican national convention cleveland last july critics fault clarke management milwaukee county jail mentally ill man die 2016 dehydration inquest jury recommend seven employees jail criminally charge democratic senator kamala harris california call clarke appointment disgrace milwaukee county sheriff rescind homeland security job media