In her surprisingly strong 8-percentage point victory over US Senator Scott Brown, Democrat Elizabeth Warren rang up huge margins in urban enclaves and captured the vast majority of Obama voters, denying Brown enough “ticket-splitters” for the Republican to survive, according to a Globe analysis of election results. Brown, who won the seat in January 2010 by beating heavily favored Democrat Martha Coakley, won most of the same communities on Tuesday as in his first race, with a few exceptions.
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