First predictions called Franken the winner. The first official count (after all precincts were recorded) showed Coleman ahead by a bit. Franken was suspicious, and discovered that many districts (under the guidance of our terrible governor) threw out thousands of ballots, citing bogus reasons. These thousands of ballots were reviewed by a board, who voted on the legitimacy of each ballot, one by one. After that, the official count (with these ballots recorded) showed Franken ahead by 300 or so, and a legal battle ensued. Coleman kept appealing, all the way up to the supreme court.
Today, they officially passed judgement on Franken winning, by those 300 or so votes.