I don't think it was teh bunneh...to give a bit of credit here, this is likely just advanced planning on Trump's part, though it is giving away his intentions in regards to the Mexican-American War (we never said we'd protect the southwestern states forever). Once he renegotiates the peace treaty and pulls our troops out, Mexico will have control over Texas, Arizona, Utah, California, New Mexico, and Nevada. It is to be assumed that western Colorado will be used as a bargaining chip by Pence during the cease fire negotiations.