President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE on Monday claimed that the country would "save billions of dollars" if Democrats voted to provide billions of dollars in funding to build a wall along the U.S.-Mexico border.

The president went on to repeat a threat to close the southern border and said that immigrants will not be allowed in the "country illegally."

"Either way, people will NOT be allowed into our Country illegally! We will close the entire Southern Border if necessary. Also, STOP THE DRUGS!" Trump wrote on Twitter.

We would save Billions of Dollars if the Democrats would give us the votes to build the Wall. Either way, people will NOT be allowed into our Country illegally! We will close the entire Southern Border if necessary. Also, STOP THE DRUGS! — Donald J. Trump (@realDonaldTrump) December 3, 2018

Trump has previously threatened to shut down the southern border in response to an approaching caravan of Central American migrants.

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He has additionally directed thousands of troops deployed to the border and attempted to curb certain immigrants from being able to claim asylum as the group of migrants trekked toward the U.S. border.

The president revived his calls for a border wall on Monday as Congress grapples over wall funding while trying to pass spending bills and avert a partial government shutdown.

The Senate passed its version of the Department of Homeland Security (DHS) spending bill with bipartisan support over the summer. The measure would allocate $1.6 billion for border security, including fencing.

The White House has since demanded $5 billion for border security, including wall funding, putting Democrats and the president at an impasse.

Trump has threatened to veto a bill that does not include adequate funding, while Senate Minority Leader Charles Schumer Chuck SchumerSenate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' Jacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee MORE (D-N.Y.) has said Democrats oppose spending more than $1.6 billion.

Cracking down on illegal immigration and building a wall along the U.S.-Mexico border has been a hallmark of the Trump administration after focusing heavily on the issue in the 2016 presidential campaign.

Congress has until Dec. 7 to pass seven appropriations bills to keep the entire government funded. The president previously signed five funding bills in September, and agencies covered by those bills would not be affected by a shutdown this month.

Trump told reporters aboard Air Force One en route back from the Group of 20 summit on Saturday that he would consider approving a two-week extension of government funding to provide more time in the wake of the death of former President George H.W. Bush.