CNN's senior legal analyst Jeffrey Toobin on Monday argued that 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's proposed wall along the southern border "wouldn't make any difference" in stopping migrants from storming the border and warned that a government shutdown over funding for the wall would not be a "popular move."

Toobin argued that while Trump's base would agree with partially shutting down the government over wall funding, independents and Democrats reject the wall, which Toobin deemed "unpopular," and do not "fear" a shutdown over the issue.

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"His base is going to support him no matter what," Toobin said in an appearance on CNN's "New Day."

"His base was not good enough to get him control of the United States House of Representatives, so the idea that his base is going to control the outcome here is, I think, not really accurate."

"If he tries to shut down the government, I don't think that will be a popular move over this wall. The wall is unpopular," Toobin continued. "Yes, his base likes the wall, but other than that, shutting down the government over this wall, I don't see why that is something Democrats should fear because most people don't want the wall. As this incident illustrates, the wall wouldn't make any difference."

Toobin's comments come as U.S. authorities shut down one of the busiest ports of entry in the world and fired tear gas at a group of Central American migrants over the weekend. Trump on Monday morning threatened to close the border "permanently" while demanding that Congress "fund the wall."

If a spending bill is not passed by Dec. 7, a partial government shutdown could occur. Trump has threatened to veto any spending bill that does not include wall funding.

A poll from Morning Consult released Wednesday found 55 percent of registered voters polled opposed shutting the government down over funding for the wall, with only 31 percent supporting it.

Among Republican voters, however, 49 percent supported a shutdown over wall spending, and slightly more than a third, 34 percent, opposed the move.