Martin Sheen says U.S. Immigration and Customs Enforcement (ICE) agents sport masks in order to hide the fact that they're "not proud of what they're doing."

"I think one of the reasons so many of the soldiers and the ICE folks, I think that they're covering their faces because they don't want to show their emotion," Sheen, a longtime Democratic supporter and fundraiser, told Nicolle Wallace at the MSNBC Live event in New York on Saturday.

"They don't want to show that they're not proud of what they're doing — particularly when they're dealing with mothers, and children and undocumented people who are of no threat whatsoever," the 85-year-old actor, who played fictional President Jed Bartlet on NBC's "The West Wing," said.

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