At 41:01 in his CPAC speech tonight, Trump starts talking about Bill Barr and questioning his lack of interest in election fraud.
At 43:06 Trump says he has a statement from US ATTORNEY in PA saying Bill Barr would not allow him to investigate fraud.
He goes on to say nobody else has seen this yet. Specifically asks Devin Nunes and Matt Gaetz if they have it yet. He directs them to talk to PA US Attorney and find out what is in letter.
He was praising Matt and Devin on fighting in Congress just a few minutes earlier. He also mentioned Gaetz last name earlier in the speech while looking in the same direction. He asked them all to stand at the beginning. Just an educated guess who he was speaking to, but it was a guess.