FILE - Craig Robinson, brother of former first lady Michelle Obama, and his wife, Kelly Robinson, arrive for a State Dinner for Singapore's Prime Minister Lee Hsien Loong, Tuesday, Aug. 2, 2016, at the White House in Washington. The Robinsons are suing a private Milwaukee school alleging it refused to allow their two young sons to re-enroll after they raised concerns about racial and ethnic bias by school staff. (AP Photo/Pablo Martinez Monsivais, File)