Mexican President Obrador thanked Trump for not talking about the topic of a public border wall at a summit in Washington this week.

"We thank him for not raising the border wall issue in public," Mexican President Lopez Obrador told reporters at the government's regular news conference on July 10, adding that the border wall

Obrador also thanked his American counterpart, Donald Trump, for his "less discriminatory" tone during his visit.

Building a wall along the 3,200-kilometer-US-Mexico border is a key and also controversial promise of Trump during the 2016 campaign.

Last year, the White House boss threatened to impose tariffs on Mexican imports, prompting the government to take "easing" moves quickly.

The summit in Washington between the two leaders of the United States - Mexico mainly focused on economic issues, especially congratulating the revised North American trade agreement, which came into effect earlier this month.