U.S. President Donald Trump waves as he leaves the White House en route to Mar-a-lago Estate in Florida after signing the tax cut bill into law in Washington D.C., the United States, on Dec. 22, 2017. U.S. President Donald Trump on Friday signed a 1.5-trillion-dollar tax cut bill into law, as well as a spending bill to keep the federal government running through January 19, 2018. (Xinhua/Yin Bogu)