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#Unbelievable: How important is 'building the wall' to President Trump’s base?

04:09

There is a common belief that Donald Trump has to build a southern border wall, or his supporters will lose faith in him. But if the President doesn’t successfully oversee construction of the wall, will he really lose support among his backers? MSNBC's Katy Tur says the wall may not be as big of an issue for them as some experts believe.