Comey's written statement has been published in the NY Times. It confirms and clarifies much of what has been published since his dismissal. Most Republicans will say "so what" and most Dems will say it sounds like "obstruction of justice." The DNI refused to confirm or deny yesterday's story that Trump asked him to intervene with Comey to stop the Flynn investigation. A similar effort by Nixon was a trigger for impeachment. But the request was on tape and came after nearly a year of investigations.
I think Trump is guilty of multiple illicit conflicts of interest and violation of the Emoluments Clause, so his obstruction of justice is only one more article to add to the list. Some day we will learn that the Special Counsel has convened a grand jury to investigate all of this. It is very clear that Trump has attempted to impede the Russia investigation, but the proof is necessary before any action is taken and, after all, it will be a political decision to act. Comey will begin to provide official proof with his testimony. Republicans were very slow to come around on Nixon too. As John Dean famously said: "There is a cancer on the presidency" and it destroys slowly and inexorably. We are watching it unfold before our eyes.
If Trump had a lawyer he would listen to, he would be told to open his administration to a full investigation. Reagan survived Iran-Contra because he had the wisdom to do so. Trump's attempts to impede the investigation will eventually destroy his administration, such as it is. Whether it is because of coordination with the Russians or his stupidity in obstruction remains to be seen. Read James Comey’s Prepared Remarks for Testimonyhttps://www.nytimes.com/interactive/2017/06/07/us/politics/document-Comey-Prepared-Remarks-Testimony.html