Trump's Energy Policy and Its Impacts: after his inauguration, Donald Trump proposes the US Priority Energy Policies: (1) the development of domestic fossil energies to ensure the energy autonomy; (2) the ignorance of climate change and the withdrawal from the Paris Agreement; and (3) to levy the Border Adjustment Tax. It is as good as casting a bomb shocking the global energy situation. Oil Supply Crucially Related to National Energy Security: oil is the most important energy use and energy trade transaction accounted for two-thirds in the world. As the US itself has abundant oil and gas reserves, there is no need for the development of clean energy, since it would lead the US to deteriorate the dependence on imported oil and sometimes involve in the overseas geopolitical disputes. US LNG Export - The Major Gamble in 21th Century: thanks to the shale oil and gas revolution success, the United States has become a net oil and natural gas exporter. However, the development in LNG (liquefied natural gas) export industry needs expensive investment. LNG lacks the price advantage, compared to pipeline gas. The LNG export is a big gamble for the US energy industry.