News Arizona Gov. Doug Ducey doesn’t support U.S.-Mexico border shutdown, as Trump has threatened April 1, 2019April 2, 2019 Maria Polletta, Arizona Republic Comments Off on Arizona Gov. Doug Ducey doesn’t support U.S.-Mexico border shutdown, as Trump has threatened Gov. Doug Ducey said he doesn't support shutting down the U.S.-Mexico border, saying that Mexico is Arizona's "No. 1 trading partner, times four."