In one of the final public polls we should see before Tuesday's special election on Massachusetts, American Research Group (600 LVs, 1/12-14, MoE +/- 4%) finds Republican Scott Brown with a slight edge over Martha Coakley.

Special Election Matchup
Brown (R) 48
Coakley (D) 45
Kennedy (I) 2
Und 5

Coakley loses one-in-five Democrats to Brown, while the Republican state senator has 94 percent of Republicans behind him. Brown has a commanding 58-37 advantage among "unenrolled" voters, mainly independents and those who prefer not to register affiliation with the major parties.

A trend worth noting as well: 9 percent of voters say they'd already cast a ballot through absentee voting. Brown leads Coakley among this group 58-42.

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