Trump threatens to withhold census documents from U.S. Congress

The Trump administration is threatening to invoke presidential powers to withhold documents on its efforts to add a citizenship question to the 2020 U.S. Census, unless House Democrats drop threats to hold two top Trump advisers in contempt of Congress.In a letter to House of Representatives Oversight Committee Chairman Elijah Cummings, a Democrat, President Donald Trump's Justice Department on Tuesday accused the committee of failing to follow constitutional norms by refusing to negotiate over