https://www.commondreams.org/views/2019/05/15/us-constitution-demands-house-undertake-trump-impeachment-inquiry?fbclid=IwAR0Pqx-tRZRTnjUnqjQdU9yZ-v0-MezGL6Zwll-VInfMcjbS2SIa-odm08Y
"Every child in America is supposed to learn about the Constitution’s basic principles of separation of powers, and checks and balances. But these days, every child and every adult in America is learning from Donald Trump that these principles are bunk. By issuing a blanket refusal to respond to any congressional subpoena, Trump is saying Congress has no constitutional authority to oversee the executive branch. He’s telling America that Congress is a subordinate branch of government rather than a co-equal branch. Forget separation of powers."