Next step, identify the leakers and the repeaters, disinvite them from future meetings, press gatherings, etc. Free up some room at press briefings. No point having these people present if all they do is twist things and lie.
Yes, Sarah Sanders is doing a great job of dealing with these vermin.
Start with disinviting Dick Turban from any future events. He is grim, humorless, and puts his progressivism far above the truth. In other words, a Stalinist.
Even Chuckie Cheez Schumer can turn on the charm and appear affable (an act). But Turban is an aging bitter ex-Viet Cong.