The memo outlines how Trump would try to compel Mexico to pay for a 1,000-mile wall if he becomes president.
In his proposal, Trump threatened to change a rule under the USA Patriot Act, an anti-terrorism law, to cut off funds sent to Mexico through money transfers known as remittances.
Trump said he would withdraw the threat if Mexico makes "a one-time payment of USD 5-10 billion" to finance the wall."
The Mexican central bank reported that money sent home by Mexicans overseas hit nearly USD 24.8 billion last year, overtaking oil revenues for the first time as a source of foreign income. Cutting off those transfers would therefore represent a significant blow to the Mexican economy. Trump's campaign says that money "provides substantial leverage for the United States to obtain from Mexico the funds necessary to pay for a border wall."
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The release of the memo was first reported by the Washington Post early today.
This is not the first time that Trump has spelled out options for pressuring Mexico into paying for his signature policy proposal.
In an immigration overhaul plan released in August, Trump's campaign suggested a number of options for compelling Mexico to pay for the wall. Those included impounding "all remittance payments derived from illegal wages," increasing fees on temporary visas issued to Mexican CEOs and diplomats -- "and if necessary cancel them" -- increasing fees on border crossing cards, increasing fees on NAFTA worker visas from Mexico, and increasing fees at ports of entry between the two countries.
The billionaire businessman has estimated his proposed wall would cost between USD 10 billion and USD 12 billion, and has argued that it would protect the country from illegal border crossings as well as halting drug shipments.