MEXICO CITY (Reuters) – Measures agreed last month between Mexican state governors and Texas to tighten border security following Texan pressure over immigration were tantamount to “extortion”, Mexico’s foreign minister was quoted as saying on Sunday. Texas Governor Greg Abbott made deals with the governors of the border states of Chihuahua, Coahuila, Tamaulipas and Nuevo Leon after enhanced Texan security checks to prevent smuggling of people and contraband had disrupted trade. The episode sparked a testy response from Mexican President Andres Manuel Lopez Obrador, who described Texas’ behavi…