Mexico’s global trade deficit narrowed to $1.6 billion in September from $1.9 billion in August, but that was double what economists expected. Import growth of 2% was driven largely by an 8% jump in imports from the United States. A continued trade surplus of $1.8 billion with the U.S. means Mexico will remain in the presidential election crosshairs. Exports by Mexico increased 1%, with auto exports rising 3% and likely to go further given recent announcements by Ford and GM.