About a year and a half ago, on Sept. 18, 2017, a relatively unknown Minnesota state representative flew to New York City to hold a closed-door meeting with the president of Turkey, Recep Tayyip Erdogan, who was in town for the 72nd U.N. General Assembly. This meeting of now-Rep. Ilhan Omar, D-Minn., with Mr. Erdogan, the despotic ruler of Turkey, went almost entirely unreported, as it was not open to the press and Omar was not a high-profile figure. Since then, photos of the meeting surfaced on social media, but it largely appeared that there was no report detailing what...