Romney has no Mexican cousins. The Mormons only settled in a rather deserted part of Chihuahua because (a) the Mexican dictator, Porfirio Diaz, wanted to quell the insurrections among the Yaqui Apaches in that area. They were attacking mining trains in the area, and (b) the Mormons who settled in Nuevas Casas Grandes had bunches of wives and could not keep them legally otherwise. Among these polygamists were some Romneys.
There war no Mexican culture in that area at the time:just some Indians and the gringo Mormons and their huge families.
No way that a Hispanic could have gotten the GOP nomination in 2012, jut like there was no way that Herman Cain could have gotten it. They played around with Cain and his silly 9-9-9 plan for a month or so, just like they dallied with Bachmann, and then SURPRISE! a bunch of seduced White women came out of the woodwork and *poof!* Cain was gone. Bachmann was even easier to dispose of because she was bull goose loony.