Trump seen leaning hard on new DHS chief over border

Kevin McAleenan, presently commissioner of U.S. Customs and Border Protection (CBP), will be the fourth person to helm the agency under Trump.The president, who made immigration a key campaign theme, has grown increasingly frustrated with his officials, even as they have implemented aggressive policies to limit immigration.Immigration experts say Trump lately has called for policies that would violate U.S. laws, international agreements and court settlements or require U.S. Congress to pass majo