I didn’t hear Rush mention Gorka. He did mention Cohn and Tillerson and said their comments undermined Trump, essenially throwing him under the bus. Rush said that after those comments he truly wondered why Cohn and Tillerson were still there.
Trump isn’t much interested in foreign policy. I don’t think he really cares what Tillerson says about him. Cohn is there to deal with all the lefty Jewish peeps on Wall Street would be my guess.