Here's the back story and why Obama is doing this at the risk of upsetting the Teamsters



"In 2007, President George W. Bush implemented a pilot program that allowed a limited number of trucks to enter select parts of the United States. Last year, a stealth provision tacked onto the stimulus package by Democrats killed the pilot program, and launched the Mexican tariffs.
The original list of items subject to tariff included 89 U.S. exports. Last week, Mexico announced a new set of tariffs that broadens the list to 99 items — subtracting some from the first list and adding more — valued at $2.5 billion. Newly affected products include pork, ketchup, cheeses, sweetcorn, dried and fresh apples and other fruits.
The list now comprises 54 agricultural products and 45 manufactured products.
Tariffs run as high as 45 percent on some items, a big handicap for U.S. business that can be undercut by competitors in other countries that don’t face the added costs."

In other words Mexico was punishing us for ending the trial program and not following thru on the initial NAFTA agreement.

What Obama did was a compromise to get that tariff off our backs. Unfortunately it affected the Teamsters in a negative way.