As the country battles record homicide rates, it remains unclear who was behind the disappearance of 43 students in 2014.
But the populist leader says he won't reconsider the planned sale.
The Mexican economy minister made the announcement as he arrived at the U.S. Trade Representative's office, according to reports.
Trump told a campaign-style rally in Tennessee on Tuesday that Mexico was going to pay for the wall and "enjoy it."
The latest poll shows the leader of the left-wing Morena Party has the support of 42 percent of the electorate.
Kushner's Mexico trip indicates he will still play an integral foreign-policy role, despite losing access to classified information.
The majority of Mexicans now view the U.S. unfavorably—a shift that coincides with President Donald Trump's rise to power, according to a new poll.
Dozens of species in the reserve cannot be found anywhere else in the world.
Vicente Fox has reiterated his fierce opposition to Mexico paying for President Donald Trump's planned border wall.
The president's statements about New Hampshire were met with immediate criticism from both of the state's senators.
Mexico committed to more sustainable fishing practices to protect the species from extinction.
With around 30 of its species surviving, the vaquita porpoise is the world's rarest marina mammal.
The government's fight against criminal cartels accounted for 23,000 deaths in 2016.
China has also provisionally authorized 38 trademarks for Trump and a related company.
The U.S. must treat Mexico as a respected partner if we hope to resolve trade, immigration and crime issues.
Deeply unpopular Enrique Pena Nieto is receiving support as his response to Trump's NAFTA and border wall talk inspires national unity.
Rival politician calls for a 'national emergency plan' to 'face the damage' of Donald Trump.
Some 66 percent of respondents in a new poll say the president made a mistake in inviting Trump to visit in August.
A somber-looking Pena Nieto told a news conference that Luis Videgaray, who officials said was the architect of Donald Trump's visit, would make way for former Finance Minister Jose Antonio Meade.
"Our message to the world will be this: You cannot obtain legal status or become a citizen of the United States by illegally entering our country," Trump said in a speech in Phoenix.
But Pena Nieto insisted that Mexico would not pay for it.
The trip will take place hours before Trump reveals his proposal for cracking down on illegal immigration.
The presidency said on Twitter that Nieto had "announced the signing of a reform initiative which includes the recognition of the right to get married without any form of discrimination."