The Trump administration threatened to tear down the Kennedy Center if plans to add President Trump’s name to the front of the building and also make extensive repairs are blocked. Without the president’s support, the Kennedy Center will need to be demolished and replaced with a new structure, lawyers for the Trump administration warned in a legal brief filed late Monday. And donors will flee — leaving the center in a “financial and structural death spiral” — if they don’t see Trump properly honored with his name on the entrance of the building, they argued.The attorneys, led by Assistant Attorney...