Fewer than half of U.S. voters believe that there is an urgent issue at the southern border requiring a major response, according to a new poll, as President TrumpDonald John TrumpPentagon update to missile defense doctrine will explore space-base technologies, lasers to counter threats Giuliani: 'I never said there was no collusion' between the Trump campaign and Russia Former congressmen, RNC members appointed to Trump administration roles MORE prepares to address the nation in a televised prime time speech on border security.

A Politico/Morning Consult poll released Tuesday found that 42 percent of American voters believe that the situation at the U.S-Mexico border is "a crisis," the language Trump has used frequently to describe the influx of illegal border crossings and drug smuggling activity.

Another 37 percent of voters said that illegal immigration represented "a problem," but do not view it in the drastic terms espoused by the president. Meanwhile, 12 percent of voters described illegal immigration as neither a "crisis" nor a "problem."

The percentage of Republican voters who call illegal immigration a "crisis" is much higher, at 72 percent, while an even higher percentage of GOP voters – 82 percent – favor building a border wall.

The poll also found that despite Trump's efforts to cast blame on Democrats for the partial government shutdown, Americans largely point to his administration as the reason for the now 18-day shutdown, which continued Tuesday with no clear end in sight.

Forty-seven percent of voters said Trump was primarily to blame for the shutdown, significantly more than those who blamed Democrats in Congress, 33 percent.

The poll follows a survey from Hill.TV/HarrisX earlier this week that found that most Americans want the president and Congress to reach an agreement and compromise to end the shutdown.

Trump's demand for money to pay for a border wall has remained a sticking point in negotiations with Democrats for weeks. The president was expected to make his case for the wall funding during his Oval Office address on Tuesday night.

Morning Consult vice president Tyler Sinclair said that despite Trump's overall numbers, Republican voters remain firmly in his corner amid shutdown negotiations with the Democrats.

"Notably, 69 percent of Republican voters blame congressional Democrats, and 15 percent blame President Trump for the government shutdown. Among the same group, the president's approval crept upward, with 84 percent approving and 15 percent disapproving of his performance this week, compared to 81 percent approval and 18 percent disapproval pre-shutdown," he said.

Politico/Morning Consult's poll surveyed 1,989 registered voters between Jan. 4-6, and carries a margin of error of 2 percentage points.