"This report describes and analyzes annual appropriations for the Department of Homeland Security (DHS) for FY2017. It compares the enacted FY2016 appropriations for DHS, the Barack Obama Administration's FY2017 budget request, the Donald J. Trump Administration's request for additional funding, and the appropriations measures developed in response. This report identifies additional informational resources, reports, and products on DHS appropriations that provide additional context for the discussion, and it provides a list of Congressional Research Service (CRS) policy experts whom clients may consult with inquiries on specific topics."
CRS Report for Congress, R44621
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html