WASHINGTON — Donald Trump would try to force Mexico to pay for a border wall by targeting billions of dollars in remittances sent by immigrants living in the U.S., according to a memo released by his campaign Tuesday. The memo outlines in new detail how Trump would try to compel Mexico to pay for the 1,000-mile wall he’s promised to build along the Southern border 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 a portion of the funds sent to Mexico through money transfers known as remittances.