Lincoln was, practically speaking, the most conservative president in American history. Without him the Constitution and system of government our conservatism seeks to conserve would have ended.
Which is not to say every action of his was constitutional in the strict sense, as he would have agreed. Only that his net effect was both constitutional and necessary. I believe he would have gladly returned the country to a system closer to its prewar status than actually occurred after he was murdered.
OTOH, Teddy was a Progressive (in the terms of his time, not ours). He rejected the ideas behind the Constitution.
You are seriously out of touch with reality.