So your evidence is that he was president. Go figure. It's good to hear a liberal say that the Democrat congress was responsible for the Iraq and Afghan wars though.What do you mean "in on it"? He was the President. He was told by the Congress to stay the fuck out of the Contra bullshit (Boland Amendment). Congress decides who we go to war with. Congress decides when to appropriate funds for war.
Gee, you seem to be catching on. Reagan was told by Congress not to get involved with the Contra forces and the war going on in Central America. Proof he was told came in the form of a formal amendment and law passed by Congress called the Bolin Amendment. Can't be any more formal about telling a President not to do something and reminding him of the Constitution and who has war poweres. Put a legal document in front of him and make him sign it. Take pictures, and publish them. Take video and show it on TV news.
Reagan ignored the Constitution, or at least his administration ignored it.
I agree you are correct about the Congress supporting the wars in Iraq and Afghanistan. They gave approval to President Bush when he requested their approval to conduct wars in Afghanistan and Iraq. Congress gave approval so they share the blame and/or credit.