Might just be me, but I think things Obama has said or done are irrelevant to what Trump says or does.
Just want to head this "But Obama" stuff off before it becomes a habit.
Point taken and in general I agree with the sentiment, but if one is going to hold up "lying" as an impeachable offense then, I thought it could add some context. And to be fair, I did a "But Obama" and a "But Hillary".