Just looks like a generic Trump fan to me.

The #FBI continues to seek information on individuals involved in the violence at the U.S. Capitol on January 6. If you think you know the person in these photos, submit a tip at https://t.co/iL7sD5efWD. Refer to photo 320 in your tip. pic.twitter.com/lmgHfZ9FUV

— FBI (@FBI) April 29, 2021