“Mr. Trump’s flurry of moves this week to block multiple congressional investigations signaled a new phase of constitutional friction that could redefine long-murky boundaries of Congress’s power to conduct oversight of the executive branch — and the power of presidents to keep government affairs secret from lawmakers.” NYT: Trump Vows Stonewall of All House Subpoenas, Setting Up Fight Over Powers.

+ WaPo: Trump’s defiance puts pressure on Congress’s ability to check the president. (America, better check yourself before your wreck yourself…)