Xinhua photos of the day

The Capitol Hill is shrouded in fog in Washington D.C., the United States, on Dec. 17, 2019. U.S. President Donald Trump on Tuesday sent a six-page letter to House Speaker Nancy Pelosi, slamming the House Democrats impeachment effort as an "illegal, partisan attempted coup" and an "unprecedented and unconstitutional abuse of power." (Xinhua/Liu Jie)