Business groups are celebrating too early. Union labor can still sabotage the deal by making impossible demands that may find an audience in Washington. The Teamsters in particular are up in arms at the possibility that Mexican drivers will work longer and harder for a fair wage than their union brethren ever will. They didn't get the message that trucking firms hurt by the high cost of fuel need any lever they can find to stay competitive. Teamsters are better off blaming their woes on Middle Eastern unrest than on cross-border competition closer to home.
Full disclosure: No position in trucking stocks at this time.