Sam Nunberg

Updated on March 6 at 11:45 a.m. ET

A former campaign aide to Donald Trump appears to have changed his mind and will not fight a subpoena he says he has received in the Russia investigation — after daring special counsel Robert Mueller to arrest him in multiple media appearances.

Sam Nunberg called reporters and TV news programs on Monday and said live that he'd gotten a grand jury subpoena as part of Mueller's investigation asking for communications with other people in the Trump orbit — but that he would not comply.