President Donald Trump is set to deliver a high-stakes prime-time address Tuesday night, making the case to the nation, as he tweeted Monday, that there is a “Humanitarian and National Security crisis on our Southern Border.”

The president’s first Oval Workplace address, intended at developing public assistance for his signature project concern– his suggested border wall– comes on the 18th day of a partial government shutdown over his need that Democrats consent to billions of dollars to spend for the wall. He’ll be followed by a televised joint action from Democratic leaders, House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer, who adamantly oppose spending for a wall and are requiring Trump consent to re-open the federal government.

Therapist to the President Kellyanne Conway cast the speech as a chance for the president to speak to the nation, stressing that it will be “in his voice, in his words.”

“The president is going to bring his case directly to the American people,” Conway stated. “He requires to make sure that he can get his message straight to the American individuals.”

( MORE: Trump to check out border, make prime-time speech in PR blitz for border wall )

PHOTO: Vice President Mike Pence appears on Good Morning America, Jan. 8, 2019.

class=” e_image e_full” id=”e_image_60227464″> PICTURE: Vice President Mike Pence</p><p itemprop=appears on Great Morning America, Jan. 8, 2019. “>ABC News Vice President Mike Pence appears on “Great Early Morning America,” Jan. 8, 2019. President Trump has actually said publicly in recent days that he is weighing the possibility of officially declaring a” national emergency” over border security– and said he thinks he has the authority to do so– in an effort to circumvent Congress and utilize loan designated to the military– or from somewhere else in the government– to money the wall. Since Tuesday early morning, Vice President Mike Pence, in an interview on ABC’s “Good Early morning America,” said the president had yet to make a decision, stating, “It’s something that he’s taking a look at.”

Hours before the president was set to make the address, a senior White House official said the president continued to make revisions to the speech and had not yet made a last decision on whether to state a nationwide emergency situation.

Conway informed reporters previously in the day that the concept remains under consideration and is under evaluation by attorneys in the White Home counsel’s workplace.

( MORE: Pence calls border ‘bona fide emergency,’ evades questions about Trump fallacies )

Pence took a trip to Capitol Hill Tuesday afternoon to rally congressional Republicans ahead of the president’s speech.

Trump is anticipated to head to Capitol Hill on Wednesday to meet Senate Republicans.

Later on Wednesday, crucial Congressional leaders are expected to return to the White House to meet in person with the president for the third time in the continuous shutdown standoff. The leaders last sat down on Friday.

As part of the president’s PR offensive, the White House says, he plans to go to the southern border on Thursday to check out with those on the “frontlines” as he continues to make the argument that a wall is essential to “national security,” throughout which he’s made many incorrect claims and exaggerations.

“We have an absolute crisis, and of bad guys and gang members coming through. It is national security. It’s a national emergency,” President Trump stated on Sunday, as he spoke about his deliberations.

PHOTO: The U.S.-Mexico border fence near New Mexicos Highway 9, near Santa Teresa, Dec. 23, 2018.

 PHOTO: The U.S.-Mexico border fence near New Mexicos Highway 9, near Santa Teresa, Dec. 23, 2018.</span></figcaption></figure><p itemprop=

“>Paul Ratje/AFP/Getty Images The U.S.-Mexico border fence near New Mexico’s Highway 9, near Santa Teresa, Dec. 23, 2018. The White Home put out a news release Tuesday afternoon pointing out the president’s require a “wall” and duplicating his talking points that the “southern border is overwhelmed with prohibited migration, gang violence, criminal activity, drugs, and human trafficking.”

But in contacting Congress to “do more to resolve the border crisis” the White House utilized the term “physical barrier”– not wall– and Trump himself has said “steel slats” would be acceptable.

“We can not keep our country safe without sufficient funding for Border security, consisting of a physical barrier and increased in funding for law enforcement,” the release said.

Although the president stated he believes he has the authority to state a national emergency, such an action would practically certainly be challenged in the courts.

The president told reporters Sunday that his choice on whether to declare an emergency situation would depend upon the status of an ongoing political deadlock with Democrats over the president’s need that a border wall be moneyed as part of an arrangement to resume shuttered portions of the federal government.

“I might declare a nationwide emergency situation reliant on what’s going to take place over the next few days,” Trump said Sunday. “We have a meeting with Vice President Pence and a group will be going to a particular area that you understand where that and they’ll be having another conference.”

As the president looks for to make a renewed case of seriousness surrounding the situation at the southern border, he is drawing from comparable rhetoric that he has actually used for years in going over the subject. As far back as the 2016 governmental campaign, the president discussed the circumstance at the border as a crisis and a nationwide emergency.

“As we speak, we remain in the middle of an extraordinary crisis on our middle of an unprecedented crisis on our middle of an extraordinary crisis on our southern border,” he stated Oct. 30, 2016, speech in Albuquerque, New Mexico.

“They tell us the border crisis is the worst it’s ever been. It’s a nationwide emergency situation,” Trump said on Oct. 31, 2016, in Grand Rapids, Michigan.

Regardless of Trump campaigning for a wall and increased border security in the run-up to the midterm elections, Democrats gained control of the Home and polls have actually shown most Americans oppose the president’s proposed wall.

ABC News’ Mary Bruce, Jon Karl and Trish Turner contributed to this report.

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