Tatum is eventually going to have to learn how to beat a smaller defender without pushing off. Lowry is really giving him trouble, and it's muddying up our half-court offense to the point where we're having to hoist awful shots with the shot clock expiring.
Occasionally he can get hot and just shoot over them for a while, but it's a real adventure when he has to dribble against a good defensive guard. Just part of the process. Lebron went through it too.