President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE on Sunday claimed his administration's steep tariffs on other nations are "working big time," despite little evidence to back that claim up.

The president fired off a pair of tweets vowing to tax any country that doesn't agree to "make or build" its products in the United States.

"In either event, it means jobs and great wealth," Trump tweeted.

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He argued that tariffs will allow his administration to pay down the rapidly rising debt, while also cutting taxes. However, there's been little indication thus far that the tariffs will provide such a surplus in funding, and the national debt has continued to rise under the Trump administration.

"At minimum, we will make much better Trade Deals for our country!" Trump tweeted.

Tariffs are working big time. Every country on earth wants to take wealth out of the U.S., always to our detriment. I say, as they come,Tax them. If they don’t want to be taxed, let them make or build the product in the U.S. In either event, it means jobs and great wealth..... — Donald J. Trump (@realDonaldTrump) August 5, 2018

..Because of Tariffs we will be able to start paying down large amounts of the $21 Trillion in debt that has been accumulated, much by the Obama Administration, while at the same time reducing taxes for our people. At minimum, we will make much better Trade Deals for our country! — Donald J. Trump (@realDonaldTrump) August 5, 2018

Trump has fiercely defended the decision to impose steel and aluminum tariffs on Canada, Mexico and the European Union (EU), among others, as well as billions of dollars in duties on Chinese goods. The move has prompted concerns of a global trade war as each nation has responded with retaliatory tariffs on U.S. products.

The president announced an agreement with the head of the European Commission last month to restart negotiations over a trade deal between the EU and the U.S. The two nations agreed to work toward lowering industrial tariffs, and the EU will purchase more soybeans from U.S. farmers.

Aside from that, Trump's tactics have yet to yield tangible positive results.

The Department of Agriculture has been forced to offer $12 billion in aid to farmers directly negatively affected by retaliatory tariffs imposed on U.S. grain, produce and meat exports. The aid will be used to assist and buy crops from farmers.

The U.S. and China have already slapped tens of billions of dollars worth of tariffs on the other nation's products, and have since ratcheted up threats of further tariffs.

Beijing said Friday that it would impose tariffs upward of 25 percent on 5,207 American goods if the Trump administration follows through with its threats to hit China with 25 percent tariffs on $200 billion of Chinese imports.

Trump has remained defiant in the face of Republican and Democratic opposition to the tariffs. Lawmakers have warned that the duties will ultimately hurt American workers.