The Washington Post has posted the full text of Comey's prepared testimony, annotated: https://www.washingtonpost.com/news...p-asked-him-annotated/?utm_term=.35aa101b30d7
I took some time to read through everything. I find it to be believable, reliable, and substantiatable testimony, and I agree completely that it's obstruction of justice. Trump strongly implied on multiple occasions that if he wanted to keep his job he'd better drop the investigation. And then when Comey didn't change the investigation, he indeed was fired. Damning.
That was a pretty sincere sounding testimony. More importantly, it was very detailed. If the guy is lying then he'd have to have plotted something long in advance with all his notes and calls to his superiors, AG's office, etc. Why would somebody set up something like this that far in advance? They're smart and cunning, sure, but it doesn't ad up to me.