1. The independent vote
Traditionally, around 50 percent of Massachusetts voters are registered as "unenrolled," or independent. With the state's tiny Republican base, Scott Brown needs to convince independents he's a better option than Martha Coakley. Brown has hammered home the message that he's a free-thinking independent, not a party-line candidate, and some polls show him with a significant edge among independents. Will it work? Or will Coakley grab enough independents to keep Brown in the state Senate?
John Tlumacki/Globe Staff