Editor's Note: There are just 48 days until Election Day, and the NBC News political unit each day will profile the most competitive races this midterm season.
Democratic incumbent Patrick Murphy is the favorite in this race over Republican Carl Domino, who won a fractious GOP primary with just 38.4% of the vote. Murphy, a political newcomer in 2012, defeated polarizing Republican (and fundraising behemoth) Allen West two years ago by fewer than 2,000 votes.