Sticker Mule CEO Anthony Constantino has filed to run for Congress to succeed outing Rep. Elise Stefanik, R-N.Y., who was appointed to be the next U.S. ambassador to the United Nations. Sticker Mule CEO Anthony Constantino has filed to run for Congress to succeed outing Rep. Elise Stefanik, R-N.Y., who was appointed to be the next U.S. ambassador to the United Nations.