Unions, eh!  Congress, who are they?  Thats the position that seem's to have been taken with regards to those groups.  At a White House press conference last week with Mexico's President Felipe Calderon, President Obama announced the end to what has been a nearly 20-month ban on Mexican trucks crossing the U.S. border to roam freely on U.S. roads.

Remarkably, Obama made the decision without consulting Congress, even though the halt to the Bush administration's Mexican truck demonstration project came about when Congress voted to prohibit the Department of Transportation from spending further on the effort.
The Wall Street Journal reported that half the $2.4 billion in punitive tariffs imposed by Mexico after Congress rescinded funds and put an end to the Bush-era push to allow Mexican trucks into the U.S. will be suspended when the deal is signed by the U.S. and Mexico, expected within 60 days.
The remainder of the tariffs will be lifted when the first Mexican long-haul company complies with a series of U.S. certification requirements, including English language proficiency, drug testing and safety examinations.

So we might get a break for up to a year as those drivers come into compliance.  But was this a good idea to allow them on our roadways?