There have been many presidents in the United States, but if I had to choose one, it would be Abraham Lincoln. Abraham Lincoln was our president during our bloody civil war over slavery. After the war, he made the emancipation proclamation that declared that all slaves were to be free. He did not get to live long after that though, because he was assassinated by John Wilks Booth. Abraham Lincoln had a nickname of honest abe because he would never lie and always tell the truth.