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 requests 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. The suite of CRS reports on homeland security appropriations tracks legislative action and congressional issues related to DHS appropriations, with particular attention paid to discretionary funding amounts. The reports do not provide in-depth analysis of specific issues related to mandatory funding—such as retirement pay—nor do they systematically follow other legislation related to the authorization or amending of DHS programs, activities, or fee revenues. Discussion of appropriations legislation involves a variety of specialized budgetary concepts. The Appendix to this report explains several of these concepts, including budget authority, obligations, outlays, discretionary and mandatory spending, offsetting collections, allocations, and adjustments to the discretionary spending caps under the Budget Control Act ( P.L. 112-25 ). A more complete discussion of those terms and the appropriations process in general can be found in CRS Report R42388, The Congressional Appropriations Process: An Introduction , coordinated by [author name scrubbed], and the Government Accountability Office's A Glossary of Terms Used in the Federal Budget Process . Generally, the homeland security appropriations bill includes all annual appropriations provided for DHS, allocating resources to every departmental component. Discretionary appropriations provide roughly two-thirds to three-fourths of the annual funding for DHS operations, depending on how one accounts for disaster relief spending and funding for overseas contingency operations. The remainder of the budget is a mix of fee revenues, trust funds, and mandatory spending. Except in summary discussions and when discussing total amounts for the bill as a whole, all amounts contained in the suite of CRS reports on homeland security appropriations represent budget authority and are rounded to the nearest million. However, for precision in percentages and totals, all calculations were performed using unrounded data. Data used in this report for FY2016 and FY2017 amounts are derived from a single source. Normally, this report would rely on previous fiscal year enacted legislation and reports, as well as House and Senate legislative efforts in response to the Administration's budget request. However, due to the implementation of the Common Appropriations Structure for DHS (see below), this report relies on the Consolidated Appropriations Act, 2017 ( P.L. 115-31 ) and the accompanying explanatory statement, which was printed in the May 3, 2017, Congressional Record . Division F of this act is the Department of Homeland Security Appropriations Act, 2017. Information on the second supplemental appropriation for DHS components is drawn from P.L. 115-56 . On February 9, 2016, the Obama Administration released its budget request for FY2017. The Administration requested $40.62 billion in adjusted net discretionary budget authority for DHS for FY2017, as part of an overall budget that the Office of Management and Budget (OMB) estimated at the time to be $66.2 billion (including fees, trust funds, and other funding that is not annually appropriated or does not score against discretionary budget limits). The request amounted to a $332 million, or 0.8%, decrease from the $40.96 billion enacted for FY2016 through the Department of Homeland Security Appropriations Act, 2016 ( P.L. 114-113 , Division F). The Obama Administration also requested discretionary funding for DHS components that does not count against discretionary spending limits set by the Budget Control Act (BCA; P.L. 112-25 ) and is not reflected in the above totals. The Administration requested an additional $6.7 billion for the Federal Emergency Management Agency (FEMA) in disaster relief funding, as defined by the BCA, and in the budget request for the Department of Defense, a transfer of $163 million in Overseas Contingency Operations/Global War on Terror (OCO) designated funding to the U.S. Coast Guard. On May 26, 2016, the Senate Committee on Appropriations reported out S. 3001 , accompanied by S.Rept. 114-264 . According to the committee report, S. 3001 included $41.2 billion in adjusted net discretionary budget authority for FY2017. This was $578 million (1.4%) above the level requested by the Administration, but $246 million (0.6%) above the enacted level for FY2016. The Senate committee-reported bill included the Administration-requested levels for disaster relief funding and OCO funding covered by BCA adjustments—the latter as an appropriation in the DHS appropriations bill rather than the requested transfer. On June 22, the House Committee on Appropriations reported out H.R. 5634 , accompanied by H.Rept. 114-668 . H.R. 5634 included $41.04 billion in adjusted net discretionary budget authority for FY2017. This was $426 million (1.0%) above the level requested by the Administration, and $95 million (0.2%) above the enacted level for FY2016. The bill reported by the House committee included the Administration-requested levels for disaster relief funding. The House Appropriations Committee chose to provide the OCO funding as a transfer from the Department of Defense budget as requested. No further action was taken on these measures in 2016, and they expired at the end of the 114 th Congress on January 3, 2017. On September 29, 2016, President Obama signed into law P.L. 114-223 , which contained a continuing resolution that funded the government through December 9, 2016, at the same rate of operations as FY2016, minus 0.496%. The continuing resolution contained three sections providing specific authority to DHS to carry out key functions. All of these authorities had been requested by the Administration: Section 130:  As described above, this was a new provision allowing DHS to obligate funds in the account and budget structure of the CAS as laid out in a report submitted to the appropriations committees prior to the start of FY2017. Authorization to implement the CAS structure as outlined in the FY2017 request was originally laid out in the FY2016 Department of Homeland Security Act; Section 130 allowed modifications to the structure developed since that time. Section 131: This was a new provision similar to ones provided in past years to allow DHS to maintain the staffing levels of certain components. Section 131 allowed resources provided under the CR to be apportioned at the rate needed to maintain the staffing levels of TSA screeners and CBP personnel attained at the end of FY2016. The Obama Administration, in their request for anomalies in the CR, indicated that TSA required an anomaly because TSA repurposed funding provided for FY2016 to allow for hiring of additional screeners and converting a number of part-time screeners to full-time screeners. The Administration indicated that it would not be able to sustain that level of effort operating under a CR without the anomaly. Section 132: This was a provision extending special procurement authorities for research and development activities at DHS, known as "other transaction authority." This provision has been carried in many CRs covering DHS, including most recently as Section 129 of the FY2016 CR, P.L. 114-53 . A second continuing resolution was signed into law on December 10, 2016 ( P.L. 114-254 ), funding the government through April 28, 2017, at the same rate of operations as FY2016, minus 0.1901%. The second continuing resolution amended the first, leaving the three DHS-specific provisions above in effect, while adding a fourth. The new DHS-specific provision, Section 163, was similar to Section 131, but was broader in both the components of DHS it applied to and the flexibility it provided. The Obama Administration requested flexibility not only to maintain staffing levels of CBP and ICE, but also to maintain border security and fulfill immigration enforcement priorities. In their request, they specifically noted this flexibility was for both salaries and non-pay expenses, and was needed to "respond to unpredictable surges in migration." Congress chose to broaden the requested flexibility, extending it to the TSA and U.S. Secret Service, "to ensure border security, fulfill immigration enforcement priorities, maintain aviation security activities, and carry out the mission associated with the protection of the President-elect." A third short-term continuing resolution ( P.L. 115-30 ) was signed into law on April 28, 2017, which extended the second continuing resolution through May 5, 2017, and provided a temporary extension of health benefits for miners. No other provisions affected DHS, and the continuing resolutions and the flexibilities they provided were superseded by the Department of Homeland Security Appropriations Act, 2017. On March 16, 2017, the Trump Administration submitted an amendment to the FY2017 budget request, which included a request for $3 billion in additional funding for DHS. Congress addressed this request at the same time as it resolved annual appropriations for the federal government, through the Consolidated Appropriations Act, 2017 (signed into law as P.L. 115-31 on May 5, 2017). The act included both annual and supplemental appropriations for DHS as Division F, which is titled the Department of Homeland Security Appropriations Act, 2017. The first five titles of Division F provided annual appropriations for DHS in response to the Obama Administration's request as submitted. The bill included $41.3 billion in adjusted net discretionary budget authority in annual appropriations, as well as $6.7 billion in funding for the costs of major disasters under the Stafford Act and $163 million in funding for overseas contingency operations.