The United States Trade Representative Robert Lighthizer plans to issue the text of a trade deal with just the U.S. and Mexico on Thursday, two sources told CNBC, though the sources added that the release of the text could slip into the weekend. One source said that the text will allow Canada to join onto the agreement at a later date.The Trump administration has been hurrying to meet a self-imposed Oct. 1 deadline to strike a new North American trade deal. Mexican President Enrique Pena Nieto will leave office at the end of November . . .