'We'll give them steel': Trump explains how he would declare a 'national emergency' to build border wall

President Donald Trump on Sunday indicated that he is moving closer to declaring a "national emergency" in order to build a wall on the Mexico border.

After returning from Camp David on Sunday, Trump explained his thinking to reporters.

"We're looking at a national emergency because we have a national emergency," he said, according to CBS correspondent Mark Knoller.

Trump also said that his administration was hopeful about using steel instead of concrete to build the wall.

"I informed my folks to say that we'll build a steel barrier," Trump remarked. "It'll be less obtrusive and it'll be stronger."

On Saturday, Trump administration officials confirmed that the president is considering how to declare a national emergency as a partial government shutdown over wall funding enters the third week.

"We can call a national emergency and build it very quickly," the president insisted on Friday.