Abraham Lincoln. he faced the biggest constitutional crisis every when States begun to succeed. He had to organize an army to invade his own countrymens lands, on top of that he had to deal with incompitant general after incompitant general. He faced some of the largest anti-war rallied ever, he was in a city which was practically besieged. He had to negotitate carefully with foreign nations like France, England and Russia so they wouldn't get involved in the souther inserection. He had to over step the Constitution so far that even today those with a great insight into the law still argue wether it was legal or not, at the same time he did that he also preserved the constitution and this country became one of only a few nations in history to hold a free election in the mist of a civil war. Once the war was nearing its end, he had to find a way to bring back the former Confederate states in a way to "make the feel welcomed, and honored", while at the save time ending the institution of slavery, an institution which brough the south close to 3 billion dollars annually, and which the rest of their entire economy rested.