On day 1 promulgate a proposed rule" (regulation) amending 31 CFR 130.121 to redefine applicable financial institutions to include money transfer companies like Western Union and redefine "account" to include wire transfers. Also include in the proposed rule a requirement th On day 2 Mexico will immediately protest. They receive approximately $24 billion a year in remittances from Mexican nationals working in the United States. The majority of that amount comes from illegal aliens. It serves as de facto welfare for poor families in Mexico. There is no significant social safety net provided by the state in Mexico. On day 3 tell Mexico that if the Mexican government will contribute the funds needed to the United States to pay for the wall, the Trump Administration will not promulgate the final rule, and the regulation will not go into effect. Trade tariffs, or enforcement of existing trade rules: There is no doubt that Mexico is engaging in unfair subsidy behavior that has eliminated thousands of U.S. jobs, and which we are obligated to respond to; the impact of any tariffs on the price imports will be more than offset by the economic and income gains of increased production in the United States, in addition to revenue from any tariffs themselves. Mexico needs access to our markets much more than the reverse, so we have all the leverage and will win the negotiation. By definition, if you have a large trade deficit with a nation, it means they are selling far more to you than the reverse - thus they, not you, stand to lose from enforcing trade rules through tariffs (as has been done to save many U.S. industries in the past). Cancelling visas: Immigration is a privilege, not a right. Mexico is totally dependent on the United States as a release valve for its own poverty - our approvals of hundreds of thousands of visas to their nationals every year is one of our greatest leverage points. We also have leverage through business and tourist visas for important people in the Mexican economy. Keep in mind, the United States has already taken in 4X more migrants than any other country onplanet earth, producing lower wages and higher unemployment for our own citizens and recent migrants. Visa fees: Even a small increase in visa fees would pay for the wall. This includes fees on border crossing cards, of which more than 1 million are issued a year. The border-crossing card is also one of the greatest sources of illegal immigration into the United States, via overstays. Mexico is also the single largest recipient of U.S. green cards, which confer a path to U.S. citizenship. Again, we have the leverage so Mexico will back down. Conclusion: Mexico has taken advantage of us in another way as well: gangs, drug traffickers and cartels have freely exploited our open borders and committed vast numbers of crimes inside the United States. The United States has borne the extraordinary daily cost of this criminal activity, including the cost of trials and incarcerations. Not to mention the even greater human cost. We have the moral high ground here, and all the leverage. It is time we use it in order to Make America Great Again.