"A deadly chemical weapons attack in Syria on April 4, 2017, and a U.S. military strike in response on April 6 returned the Syrian civil war-now in its seventh year-to the forefront of international attention. In response to the April 4 attack, some Members of Congress called for the United States to conduct a punitive military operation. These Members and some others since have praised President Trump's decision to launch a limited strike, although some also have called on the President to consult with Congress about Syria strategy. Other Members have questioned the President's authority to launch the strike in the absence of specific prior authorization from Congress. In the past, some in Congress have expressed concern about the international and domestic authorizations for such strikes, their potential unintended consequences, and the possibility of undesirable or unavoidable escalation."
CRS Report for Congress, RL33487
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html