That's not obstruction. Besides, Comey already said under oath back in May that " NO ONE has ever tried to improperly influence an investigation" with him.
Criminal obstruction would be when Barry, Loretta, Hillary and Bubba cooked up the meeting on the tarmac so that Loretta could recuse herself and Comey could usurp Loretta's job by giving a pass to crooked Hillary.
That statement has been covered and corrected several times, so that moves you into the category of liar.