Early exit polls out of Wisconsin show familiar patterns for Mitt Romney and Rick Santorum as the Republican nominating contest winds through the District of Columbia, Maryland and Wisconsin today.
As in previous contests, Romney is doing better among the Wisconsin's higher-earners and Santorum with its lower-income voters, according to those who responded to poll-takers.
Santorum is more popular in Wisconsin's rural areas and Romney in urban areas, according to the polls.
Polls close in D.C. and Maryland at 8 p.m. ET and in Wisconsin at 9 p.m. ET., and 95 delegates are at stake.
Watch CNN's coverage live tonight and follow real-time results on CNNPolitics.com, on CNN's apps and on CNN's mobile website. Follow CNN Politics on Facebook and on Twitter at #CNNElections.Watch live coverage now on http://CNN.com/Live
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