Mexico crisis deepens as Trump aide floats border tax idea

Trump, who visited Republican lawmakers at their policy retreat in Philadelphia, told them he would use tax reform legislation to pay for the border wall.

"We're working on a tax reform bill that will reduce our trade deficits, increase American exports and will generate revenue from Mexico that will pay for the wall if we decide to go that route," he said.

Trump, who took office last week, views the wall, a major promise during his election campaign, as part of a package of measures to curb illegal immigration. Mexico has long insisted it will not heed Trump's demands to pay for the construction project.

He signed an executive order for construction of the wall on Wednesday. The move provoked outrage in Mexico. A planned meeting between Videgaray and US Homeland Security Secretary John Kelly was canceled, a department spokeswoman said.

Videgaray said Mexico would work with Trump but that paying for the wall was out of the question.

"There are things that go beyond negotiation," he said. "This is about our dignity and our pride."

Pena Nieto, who had been under pressure to cancel the summit, tweeted on Thursday: "We have informed the White House that I will not attend the working meeting planned for next Tuesday with @POTUS."

Trump had tweeted earlier that it would be better for the Mexican leader not to come if Mexico would not pay for the wall. He said later the meeting was canceled by mutual agreement.

Relations have been frayed since Trump launched his presidential campaign in 2015, characterizing Mexican immigrants as murderers and rapists. His trade rhetoric has hit the Mexican economy, causing consumers to rein in spending and foreign businesses to wait on new investments, according to the International Monetary Fund.

Trump has vowed to renegotiate the North American Free Trade Agreement with Mexico and Canada and slap high tariffs on American companies that have moved jobs south of the border.

Mexico ships 80 percent of its exports to the United States, and about half of Mexico's foreign direct investment has come from its northern neighbor over the past two decades.

The United States runs a $58.8 billion trade deficit with Mexico, according to the latest US government figures. But Mexico is also the United States' second-largest export market.