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U.S. President Donald Trump attends a joint press conference with visiting Finnish President Sauli Niinisto (not in the picture) at the White House in Washington D.C., the United States, on Oct. 2, 2019. U.S. President Donald Trump on Wednesday used a series of harshly-worded tweets as well as the stage of a joint press conference with the visiting Finnish president to defend himself against the ongoing impeachment inquiry. (Photo by Ting Shen/Xinhua)