The Bracero Program (1942-1964) qualifies as such. It was a bilateral agreement that allowed temporary Mexican workers to enter the United States during WW2, but was extended a few years after the conflict.
The purpose of the Bracero program of 1942 between United States and Mexico was meant for the importation of temporary contract laborers from Mexico to the US.
The Bracero Program was originally a binational temporary contract labor program initiated, in October 5,1942, by an exchange of diplomatic notes between the United States and Mexico after a series of negotiations.
The United States
Many laborers have sought employment in the United States.
Many laborers have sought employment in the United States.
Many laborers have sought employment in the United States.
Many laborers have sought employment in the United States.
United States.
Maybe on soccer. Besides that, Mexico is considered to be a business partner of the United States.
The United States of America
The United States qualifies as such. 78.2% of Mexico's exports and 48.7% of its imports go and come from the United States, respectively.
The United States is Mexico's main trade partner, both in terms of exports as well as imports; it is the destination of 81% ($303 billion) of Mexico's exports, and it is the origin of 47% ($180 billion) of Mexico's total imports (2016).