Trade across the border will not change. I believe he issue here is the stopping of a temporary pilot program that allowed some Mexican trucking companies to deliver their loads to the final destination anywhere inside the U.S..
Normally, the Mexican trucks deliver the imported goods to a terminal on the U.S. side of the border and from there a U.S. trucking company picks up the load and makes the delivery inside the U.S.
Many times it’s just a drop and hook, where the U.S. truck drops off an empty trailer and hooks on to a loaded trailer coming out of Mexico.