pro trump stickers. showcasing videos of himself appearing at trump rallies. single democrats and at least one powerful donor. >> why was he targeting democrats? >> i don't know. other than what you might normally expect. appears to be -- that will be determined by the facts as the case goes forward. i'm not able to comment on that. >> the break in the case when the fbi identified a fingerprint on one of the suspicious envelopes addressed to maxine waters. two additional pieces of dna evidence matched sayoc who was already in a law enforcement database because of his past criminal activity. >> this is phenomenal work. under the greatest pressure, under an incredibly tight