Treasury Secretary Steven Mnuchin made the official announcement: The government will not hand over President Donald Trump's tax returns to the House of Representatives, where the Democrats are the majority.Through a letter sent on Monday, Mnuchin told the chairman of the House Resources and Exchanges Committee, Richard Neal, that the panel's request "lacks a legitimate legislative purpose."Mnuchin said he made his decision based on the advice of the Department of Justice. He concluded that the agency "is not authorized to reveal the statements and information requested."The measure, thus foreseen,...