A Republican lawmaker has come up with an alternative to make Mexico pay for the president's border wall.

Arizona Rep. Andy Biggs wants the United States to fine countries $2,000 every time one their nationals is caught illegally crossing America's southern border. He proposes to redirect the money from those countries' foreign aid funds.

Mexico stands to lose an estimated $21 million in aid annually, a quarter of what the U.S. government sent the country in 2016, under such a proposal. Central American countries, where most of the migrants illegally entering America hail from, would be hit even harder.

A Republican lawmaker has come up with an alternative to make Mexico pay for the president's border wall. Arizona Rep. Andy Biggs wants the United States to fine countries $2,000 every time one their nationals is caught illegally crossing America's southern border

President Trump has repeatedly said that he'll make Mexico pay for his wall, one way or another. He's trying to make the ally and neighbor pay the price in North American Free Trade Agreement negotiations.

So far, the American taxpayer has been footing the bill for construction costs and border security enhancements requested by the Trump administration. Congress appropriated $1.6 billion to the project in 2018.

Biggs' legislative proposal would only scratch the surface of the total amount that President Trump has requested - at best it would send $1 billion annually to the project. And that's if illegal immigration numbers remain at their current levels.

President Trump has said he needs a minimum of $25 billion to complete the barrier's construction. Congress has steadfastly refused to give it to him.

Several proposals would have given the president the money he asked for in annual sums to be revisited each fiscal year, but he rejected those on the basis that they did not fully fund his wall up front. He took issue, as well, with concessions they made to Democrats seeking protections for illegal immigrants already living in the country.

Efforts have stalled to pass comprehensive immigration reform or standalone measures that deal with the president's priorities. Republicans hold a bare majority in the U.S. Senate and do not have the numbers to power through a Democratic filibuster.

Trump has hit the campaign trail hard in an effort to get more Republicans elected to the upper chamber. He has pushed the Senate's GOP leader, Mitch McConnell, to get rid of the filibuster altogether, as well.

He said in Monday evening tweet, 'Democrats want Open Borders and they want to abolish ICE, the brave men and women that are protecting our Country from some of the most vicious and dangerous people on earth! Sorry, we can’t let that happen! Also, change the rules in the Senate and approve STRONG Border Security!'

The Trump administration has sought to dramatically lower arrivals in the absence of a physical barrier through a 'zero tolerance policy' that promises every person caught illegally crossing will be prosecuted under the full extent of the law.

That policy generated a backlash, however, after it caused thousands of migrant children to be separated from their parents or guardians.

Biggs' legislative proposal would only scratch the surface of the total amount that President Trump has requested - at best it would send $1 billion annually to the project

Biggs in a press release on Tuesday came forward with another arrangement. He proposed to reduce foreign aid to Mexico and Central American counties where most of the illegal immigrants are arriving from for every infraction at the border.

He also proposed to increase fees along I-94 fees from $6 to $25 in order to raise money for security along the border.

'Even with a Republican-controlled House and Senate, we have failed to secure the funds for the border wall. In the meantime, our Border Patrol agents suffer demoralizing losses of resources and personnel. Some in Congress view border security as leverage for an amnesty deal, but that would turn a crisis into a catastrophe,' he said.

In the current fiscal year, 317,571 foreign nationals had been apprehended by the end of July. At a fine of $2,000 per person, countries with offenders would be looking at a combined reduction in foreign aid of roughly $635 million.

The fiscal year closes at the end of September.

Using the previous year to assess the proposal, when 415,191 illegal immigrants were apprehended, Biggs' proposal would have generated $830 million by the end of fiscal year 2017.

U.S. Customs and Border Protection data puts the number of illegal border crossings by Mexican nationals at 11,094 in FY 2017.

In 2016, the last year USAID released a full set of foreign aid data, the United States sent $87,017,147 million to Mexico. Roughly a quarter of the money, $21 million, would have been redirected to the building of Trump's border wall under Biggs' proposal.

Guatemala, another country that would be affected, in 2016 received nearly $297 million in foreign aid from the United States. The U.S. government says that $29 million of the money went directly to anti-narcotics operations.

At a rate of 39,484 illegal crossings, the fine for those infractions under Biggs' legislation would come out to roughly $79 million.

El Savador would be similarly affected. Honduras would also take a big hit in foreign aid if Biggs' policy were implemented.

President Trump has suggested at least twice in public that he could wipe out foreign aid to all of Central America in response to the migrant crisis.

'Think of all that aid that we give to some of these countries,' he said in a June speech to the National Federation of Independent Business. 'Well, I'm going to go very shortly for authorization that when countries abuse us by sending their people up — not their best — we're not going to give any more aid to those countries.'

Senior administration officials told DailyMail.com response that there are no actual plans in the works, however, to do what the president has been claiming.