president donald trump nominee u.s. supreme court due name tuesday could immediate impact case already pending justices nine-seat court operate eight justices since death conservative antonin scalia feb. 13 2016 four liberals four conservatives court end 4-4 split decisions several case new justice could cast decide vote case consider justices term end june look case new justice could pivotal gloucester county school board v. g.g major transgender right dispute whether public school district virginia prevent female-born transgender student identify male use boys bathroom trinity lutheran church v. pauley religious right case missouri church contend state violate u.s. constitution first amendment guarantee religious freedom deny fund playground project due state ban aid religious organizations epic systems corp v. lewis significant case business labor whether company head costly class action lawsuits force employees give right pursue work-related legal claim court group microsoft corp v. baker class action case microsoft corp bid fend claim xbox 360 owners contend videogame console design defect cause game discs gouge factbox trump u.s. supreme court pick could affect pending case