He is the Dem nominee running against Hawley. His profile says: "Marine vet, arms control negotiator, antitrust advocate, real populist".
https://x.com/MikeKBerg/status/1848883791798177841
Look how close the targets were lmao - https://pbs.twimg.com/media/GaiPxTGWUAA57wh?format=jpg&name=large
But he's holding the stock against his neck to make it harder.