For the fourth time in just under three years, the Trump administration
finds itself looking for another Department of Homeland Security (DHS) secretary,
after acting Secretary Kevin McAleenan said he would step down.

McAleenan, an Obama administration holdover who replaced the
embattled former DHS Secretary Kristjen Nielsen,
tendered his resignation just a few days after pro-immigrant protesters drowned
out his speech at an event at the Georgetown University Law Center.

While McAleenan has been credited by the
president and others for reducing crossings at the southern border and thanked
Trump for his efforts to secure the border, he more recently expressed dismay over
the politicization of DHS, saying in a Washington Post report
that he didn’t have control over “the tone, the message, the public face and
approach of the department in an increasingly polarized time.” 

His resignation comes after an ongoing purge at DHS. Trump said he would announce a replacement for McAleenan later in the week.