President Trump is eyeing a Milwaukee sheriff who called Black Lives Matter a "terrorist movement" for a top post at the Department of Homeland Security, Politico reported Thursday.

Sheriff David Clarke Jr., an early Trump endorser, has made headlines in the past for his statements about Black Lives Matter activists, including a 2015 tweet in which he predicted the movement would "join forces with [the Islamic State in Iraq and Syria]."

Before long, Black Lies Matter will join forces with ISIS to being down our legal constituted republic. You heard it first here. — David A. Clarke, Jr. (@SheriffClarke) October 28, 2015

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Three sources told Politico that Clarke is being considered for assistant secretary at the Office of Partnership and Engagement at Homeland Security, a position that does not require Senate confirmation.

While Clarke has made headlines as an outspoken Trump backer, he faces dwindling poll numbers in Milwaukee. A January poll found that Clarke, currently a Democrat, would almost certainly lose both his party's primary and, if he had made it far enough, the general election.

Clarke has also been criticized for the death of a mentally ill man who was denied water in his department's jail.