A Mexican historian said in a New York Times op-ed that Mexico is owed "half its territory" from an "unjust loss" in the 1800s.
At the close of the Mexican-American War in 1848, the Treaty of Guadalupe Hidalgo granted the United States most of what is now California and Nevada, as well as parts of Utah, New Mexico and Arizona.
In the op-ed, historian Enrique Krauze wrote that President Trump has "torn open" the scar inflicted at the time because of his rhetoric critical of our southern neighbor.
Krauze took issue with Trump's claims that the country has "bad hombres" and that some of its people want to "steal" jobs and services from the United States.
He said Mexican politician Cuauhtemoc Cardenas laid out a solid legal case for proving the treaty is in violation of "international legal norms" if applied today.
Krauze added that the case could help prove Trump effectively has it backward when he characterizes America as the victim of Mexico.
After the 19th century war, America gave Mexico approximately $15 million in exchange for the ceded land.
Krauze wrote that the sum was too low, and called for people to be reminded of the war and the injustices the Mexican people suffered in the time since.
In light of President Trump's election and his criticisms of Mexico, Krauze said that Cardenas' case could bring a "considerable" public impact, even if the case fails in court.