washington/new york federal appeal court judge friday ask president donald trump share anti-muslim videos twitter account grill u.s. government lawyer legality president late travel ban judge pamela harris ask government lawyer hashim mooppan trump nov. 29 online share three anti-muslim videos post twitter far-right british party leader lawyers say early statements trump prove policy aim block entry muslims rather president state goal preserve national security even deference construe light favorable president little tricky find national security rationale twitter post harris say 4th u.s. circuit court appeal hear richmond virginia monitor reuters audio fee week u.s. supreme court allow ban take effect litigation ultimate validity unfold certain categories people chad iran libya somalia syria yemen bar enter unite state well people north korea government officials venezuela republican president say ban need protect unite state terrorism however judge jam a. wynn jr. say trump tweet thing opponents claim behind ban wednesday 9th u.s. circuit court appeal hold hear ban separate case bring state hawaii lawyer american civil liberties union argue ban behalf several refugee group civil right group individual american muslims say harm ban mooppan argue behalf government late travel ban consider merit separately statements trump make social media elsewhere could construe anti-muslim note late iteration ban come review government agencies need explain review process subordinate executive branch officials independent act cure taint presidential statements harris obama appointee say mooppan judge barbara milano keenan also obama appointee ask nationality relevant factor gender consider potential terrorist act could ban entry men evidence show men ordinary customary perpetrators terrorist activity keenan ask 99 percent terrorist act commit men really protect country keep men mooppan point previous ban entry iranians democratic president jimmy carter cubans republican president ronald reagan examples presidents bar people base nationality aclu attorney cecillia wang face tough question judge paul niemeyer ask would justify court question national security determinations president foreign policy black box say niemeyer george h.w bush appointee trump issue first travel ban january order target several muslim-majority countries cause chaos airports block court revise march ban expire september long court fight replace current version u.s. supreme court expect ultimately decide issue come months u.s. lawyer defend travel ban grill court trump 's tweet