It makes little difference what I think and that extends to you, also. The latest center of attraction is Comey. You have to prove intent to make obstruction stick. He should have been singing like a canary if he believed the intent of Trump's comments was to obstruct. 
Congress can impeach because they don't like the color of Trump's hair, but would look like (bigger) fools in the process. In the end what you are trying to claim as intent is no more than speculation. How about waiting for REAL evidence to come forth instead letting your anxiety to dump Trump guide your conclusions?