Yes it does matter if the President wrote Trump Jr's response to the meeting regarding the Russian attorney. If he did then it's a huge red flag that something is attempting to be hidden. It makes us have to question all statements coming from the administration. It also begs the question of whether or not there are legal ramifications down the line. Perhaps most importantly it shakes our trust in our government even more. At what point will congress as a whole stand together against an administration that is obviously in cahoots with a foreign power. More and more of us feel our nation has been hijacked by a foreign power and is being made to look like a weak puppet state by our Presidents actions and inactions regarding Russia.