Query: Donald Trump signed an executive order naming climate change as a threat "both to the economy and national security."

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First 100 days of Donald Trump's presidency <=SEP=> The first 100 days of Donald Trump 's presidency began with his inauguration as the 45th President of the United States , which occurred at noon on January 20 , 2017 . The 48th Vice President of the United States , Mike Pence , was inaugurated on the same day . The 100th day of Trump 's presidency was April 29 , 2017 . Trump first announced his plan for the first hundred days of his presidency in Gettysburg , Pennsylvania , on October 23 , 2016 , before the election .   One of Trump 's major accomplishments , made as part of a `` 100-day pledge '' , was the confirmation of Neil Gorsuch as an Associate Justice of the Supreme Court of the United States . Structurally , President Trump had the advantage of a Republican Party majority in the U.S. House of Representatives and the Senate , but was unable to fulfill his major pledges in his first 100 days and had an approval rating of between 40 and 42 percent , `` the lowest for any first-term president at this point in his tenure '' . Although he tried to make progress on one of his key economic policies -- the dismantling of the Dodd -- Frank Wall Street Reform and Consumer Protection Act -- his failure to repeal the Patient Protection and Affordable Care Act ( ACA ) in the first 100 days was a major setback . He reversed his position on a number of issues including labeling China as a currency manipulator , NATO , launching the 2017 Shayrat missile strike without congressional approval , the North American Free Trade Agreement ( NAFTA ) , renomination of Janet Yellen as Chair of the Federal Reserve , and the nomination of Export-Import Bank directors . Supporters claimed that as the first to have been elected President in present times who has held neither military or political office , he therefore faced a steep learning curve . Trump 's approval among his base was high , with 96 % of those who voted for him saying in an April 2017 poll that they would vote for him again .   Near the end of the 100 days , the Trump administration introduced a broad outline of a sweeping tax reform focusing on deep tax cuts . While it is intended to encourage economic growth , there were concerns from some members of the United States Congress about raising the national deficit . In spite of the sharp decline in gross domestic product ( GDP ) in the first quarter of 2017 -- representing the weakest quarterly economic growth in three years -- the S&P 500 was near an all-time high , representing a 12 % rise from the first quarter of 2016 , as investor confidence remained elevated . Although Trump had to concede to delay funding for the U.S. -- Mexico border wall he had promised , narrowly avoiding a government shutdown a few days before the end of the first 100 days , his rhetoric may have contributed to a sharp drop in the number of illegal crossings at the Mexico -- United States border .   Trump signed 24 executive orders in his first 100 days , the most executive orders of any President since World War II . He also signed 22 presidential memoranda , 20 presidential proclamations , and 28 bills . About a dozen of those bills roll-back regulations finalized during the last months of his immediate predecessor Barack Obama 's presidency using the Congressional Review Act . Most of the other bills are `` small-scale measures that appoint personnel , name federal facilities or modify existing programs . '' None of Trump 's bills are considered to be `` major bills '' -- based on a `` longstanding political-science standard for ` major bills ' . '' Presidential historian Michael Beschloss said that `` based on a legislative standard '' -- which is what the first 100 days has been judged on since the tenure of President Franklin Roosevelt , who enacted 76 laws in 100 days including nine that were `` major '' -- `` Trump is really pretty low down on the list . ''

Climate change policy of the United States <=SEP=> Global climate change was first addressed in United States policy beginning in the early 1960s . The Environmental Protection Agency ( EPA ) defines climate change as `` any significant change in the measures of climate lasting for an extended period of time . '' Essentially , climate change includes major changes in temperature , precipitation , or wind patterns , as well as other effects , that occur over several decades or longer . Climate change policy in the US has transformed rapidly over the past twenty years and is being developed at both the state and federal level . The politics of global warming and climate change have polarized certain political parties and other organizations . This article focuses on climate change policy within the United States , as well as exploring the positions of various parties and the influences on policy making and environmental justice repercussions .

Donald Trump <=SEP=> Donald John Trump ( born June 14 , 1946 ) is the 45th and current President of the United States . Before entering politics , he was a businessman and television personality .   Trump was born and raised in Queens , New York City , and earned an economics degree from the Wharton School . He then took charge of The Trump Organization , the real estate and construction firm founded by his paternal grandmother , which he ran for 45 years until 2016 . During his real estate career , Trump built , renovated , and managed numerous office towers , hotels , casinos , and golf courses . Besides real estate , he started several side ventures and has licensed the use of his name for the branding of various products and properties , including Trump Entertainment Resorts , Trump Steaks , and Trump Vodka . He was the founder of Trump University . He owned the Miss USA and Miss Universe pageants from 1996 to 2015 , and he produced and hosted The Apprentice , a reality television series on NBC , from 2004 to 2015 . His net worth was estimated to be $ 3.5 billion , making him the 544th richest person in the world .   Trump first publicly expressed interest in running for political office in 1987 . He won two Reform Party presidential primaries in 2000 , but withdrew his candidacy early on . In June 2015 , he launched his campaign for the 2016 presidential election and quickly emerged as the front-runner among seventeen candidates in the Republican primaries . His remaining opponents all suspended their campaigns by the end of May 2016 , and in July he was formally nominated at the Republican National Convention along with Indiana governor Mike Pence as his running mate . Many of his campaign statements were controversial or false , generating much free media coverage .   Trump won the general election on November 8 , 2016 , in a surprise victory against Democratic opponent Hillary Clinton and commenced his presidency on January 20 , 2017 . He became the oldest and wealthiest person ever to assume the presidency , the first without prior military or government service , and the fifth to have won the election while losing the popular vote . His political positions have been described by scholars and commentators as populist , protectionist , and nationalist .