US Republican candidate Donald Trump is to visit Mexico on Wednesday, hours before he details measures against illegal immigration in a speech.
Mexican migrants have been condemned by Mr Trump and vowed to construct a wall between both nations.
Mexico will be visited by him in between his immigration address in Phoenix, Arizona and a fundraising event in California, on Wednesday.
His poll ratings fall has been seen by the Republican since the party conventions last month.
Both nationally and in states that are key, he trails Mrs Clinton, who loves especially strong support among minorities.
The Mexican president would meet with Trump in private on Wednesday and said he’d encouraged both nominees for discussions.
“I believe in conversation to shield Mexican interests on earth and, mainly, to shield Mexicans wherever they’re,” he said.
Mrs Clinton’s campaign hasn’t said if she is going to travel to Mexico.
Mr Trump is a daring move. It reveals he’s not unwilling to face a country he’s mocked before. He may be made by it – Appear statesmanlike. And if he is slammed by Pena Nieto later, it could find yourself working to the advantage of Mr Trump.
One danger is that Mr Trump might say or do something contentious while there, although this will be an assembly that is quite closely managed.
The positions were already significant for Mr Trump’s immigration address on Wednesday night. They only got higher.
Mr Pena Nieto has formerly accused Mr Trump of damaging US-Mexico relations and compared the rhetoric of the Republican .
BBC Mexico Correspondent Katy Watson says many Mexicans who rely have been stressed by the possibility.
Mr Trump attributes the disappearance of occupations in the US on Mexico, with firms deciding to settle south of the border to take advantage of cheaper labour costs.
In June he expressed anger after a top golf tournament was transferred from among his classes to Mexico, accusing the PGA Tour of placing “gain ahead of thousands of American jobs”.
What Trump has said about Mexico
“They’re bringing drugs, they’re bringing crime, they’re rapists.” – May 2015
Mexico is “ripping off the US more than almost any other nation”, he said in February last year.
“Mexico continues to make billions on not only our bad trade deals but also relies heavily on the billions of dollars in remittances sent from illegal immigrants in the United States,” – from his immigration plan
…and what Mexico has said about Trump
Mr Pena Nieto spoke out against Mr Trump’s “strident rhetoric” in March, adding: “That’s how Mussolini got in, that’s how Hitler got in, they took advantage of a situation, a problem perhaps, which humanity was going through at the time, after an economic crisis.”