He made some mistakes and my biggest regret for his Presidency was his spending. When he signed those big spending bills, he signed away any republican claim to fiscal responsibility.
Even worse, his spending and resulting deficits make it easy for liberals to say tax cuts cause deficits instead of reliably producing economic benefit. We will pay dearly for that mistake.
I am willing to bet that when the truth comes out in a few years you will find that he was blackmailed into a lot of it just to keep money for our troops. Who knows what he had to trade to get that.
My biggest arguement with him was amnesty, but I'm willing to give him the benefit of the doubt on that too because I think he remembers the people who USED to come across the border and not the ones who are coming now.