five transgender members u.s. military include iraq afghanistan war veterans sue president donald trump wednesday challenge ban transgender people serve arm force trump say twitter july 26 u.s. government accept allow transgender individuals serve capacity military reversal pentagon policy lawsuit say make without consult senior military commanders surprise announcement cite healthcare cost unit disruption appeal trump conservative political base create uncertainty thousands transgender service members many come pentagon say 2016 would allow transgender people serve openly trump tweet appear dismiss find rand corporation study commission pentagon find allow transgender people serve would cost little significant impact unit readiness white house pentagon say comment pending litigation lawsuit file u.s. district court washington d.c. service members sue president three u.s. army soldier one u.s. air force airman one member u.s. coast guard active duty come transgender command officer anonymous lawsuit name jane doe fear retribution say jennifer levi lawyer glbtq legal advocate defenders group file lawsuit along national center lesbian right american civil liberties union say prepare lawsuit lawsuit say trump tweet violate right service members due process equal protection law ask court declare trump directive unconstitutional issue injunctions stop defendants list trump defense secretary jam mattis military leaders include joseph dunford chairman joint chiefs staff dunford say memo day trump tweet would change policy mattis receive official order president order yet issue meantime continue treat personnel respect dunford say lawyer levi say plaintiffs near retirement need wait official policy tweet alone create uncertainty futures transgender military personnel sue trump service ban