This is a constitutional crisis. You cannot have a President deliberately obstructing the Congressional Oversight Process. That in itself is a potential impeachable offense. If the Individual One Administration persists in this, the House has no choice but to launch the impeachment process or that will make this President and those that follow above the law. It will make this country a Banana Republic.

https://www.washingtonpost.com/opinions/in-the-battle-over-impeachment-trump-and-the-gop-have-fired-the-first-shots/2019/05/08/5d57fa6e-71d0-11e9-8be0-ca575670e91c_story.html?fbclid=IwAR22Y71jUND-21dSZJ3oRKfu9r4ASJDrGi13P-7jvmNX7qSkkk68phE1byI&utm_term=.a176b05e3ef7