Editor's Note: There are just 47 days until Election Day, and the NBC News political unit each day will profile the most competitive races this midterm season.
Republicans got their favored candidate in Miami-Dade School Board member Carlos Curbelo, who’s facing Democrat Joe Garcia in the general election. Garcia’s facing some tough ethics headlines; federal prosecutors are stepping up their criminal investigation against his former campaign manager for alleged election fraud. But Democrats hope to stir up trouble for Curbelo, urging investigators to look into his lobbying background.