D.C. and Maryland to sue President Trump, alleging breach of constitutional oath

https://www.washingtonpost.com/local/dc-politics/dc-and-maryland-to-sue-president-trump-alleging-breach-of-constitutional-oath/2017/06/11/0059e1f0-4f19-11e7-91eb-9611861a988f_story.html?utm_term=.9a985b52058e