Did Trump Just Intentionally Snub Gary Cohn?

In our preview this morning, we noted that it seemed odd that Trump's tax speech had reportedly been drafted by White House aide Stephen Miller, the leader of the nationalist arm of the White House staff, as opposed to his Chief Economic Advisor Gary Cohn.
While notable because it indicated that Trump might return to his populist roots in his first tax reform cheerleading session, most didn't ascribe any more value to the information than that.