Although the Republican presidential nominee Donald Trump claimed his meeting with Mexican President Enrique Pena Nieto was a success, those living south of the border are claiming just the opposite.

After a fury of backlash from Mexican citizens angry about Trump being invited to their country, Finance Minister Luis Videgaray was forced to resign Wednesday for advising Pena Nieto to meet with the former reality star.

Now, as a safeguard, Mexican Senator Armando Rios Piter has proposed a bill that could significantly damage the relationship between Mexico and the United States.

Sen. Piter told the Telegraph, “It was a historic error for our president to invite a person like that to our country. [Mr. Trump] used us as a campaign tool.”

In response to Trump’s past comments about canceling the North America Free Trade Agreement (NAFTA) because it cost American’s their jobs, Piter’s bill would bring about a review and possible repeal of all of the mutual agreements between the two countries.

One of the agreements that could be effected by Piter’s bill is the 1848 Treaty of Guadalupe Hidalgo, which ended the Mexican-American war and surrendered Texas and California to the U.S.

“The goal is to foresee and prevent any negative effects on Mexico if Trump becomes president of the United States,” he said.

The bill would also prohibit public funds from being used “against the country’s interest.” This would prevent Mexico from paying from paying for the wall Trump consistently insists that the country will pay for.

“We can’t take a partisan view of this,” says Sen. Piter. “All parties in the senate are in agreement that Mexico needs to stand up for itself and strengthen its relationship with the United States. We want to shut Trump’s mouth, which has been spewing this hateful speech.”