No one.
His identity was never masked in the first place since his identity was always considered pertinent to the investigation looking into how he conspired with the Russians at the end of the Obama administration.
Oh, and even if there was an unmasking, it's a minor procedure that doesn't require a warrant or a judge, and it happened only about 10,000 times in 2019 for example.
And here's the kicker. Flynn didn't lie to cover up for the fact that he was secretly communicating with the Russian Ambassador. He lied so they wouldn't know he was coordinating his discussions with KT McFarland who was with Trump at Mar-a-Lago. Here is the FBI's 302 on Flynn.
Still, I hope the Republicans don't give up on this Obamagate! thing. While Trump and Biden are both fairly unpopular, Barack Obama is the most popular national figure out there. Keep attacking GOP, keep attacking.
