I found this article (in Spanish) to be thoroughly amusing. A three-time presidential candidate, Cuauhtémoc Cárdenas Solórzano, and a lawyer, Guillermo Hamdan Castro, want to sue the United States in the name of Mexico. They want the United States to return to them the territory taken by the Treaty of Guadalupe Hidalgo in 1848. The logic of this claim is based on two assertions: that the treaty was the product of an admitted invasion of Mexican territory by the US, and that the signature of the treaty was done under the explicit threat of further violence. The plaintiffs reason that since any treaty compelled by aggression and violence must be considered null and void, the land must be returned to Mexico. The territory in question consists of California, New México, Arizona, Nevada, Utah, and portions of Colorado, Wyoming, Kansas, and Oklahoma.
If it turns out to be impossible for some reason for the US to return the land, then they want compensation for the use of the land for 168 years, but not in dollars: either in pesos or gold. “Pero claro, esa indemnización la estamos pidiendo que sea pagada o en oro o en pesos, porque los dólares no significan nada desde los años 70”.
Based on the timing, perhaps this is a sly and wacky counter to Trump’s blatant and equally wacky anti-Mexican agenda, including TrumpWall™, half of which would revert to Mexico if the lawsuit succeeded.