The race in Ohio largely came down to a showdown between Mitt Romney and Rick Santorum, and they played differently with various segments of the electorate.
CNN's exit poll shows the two got an equal amount of support from male voters, each scoring 36 percent.
Among women, Romney won 40-37.
Santorum did well among young voters, while Romney appealed more to voters 45+.
Ron Paul tied with Santorum in the 25-29 age bracket, with each candidate receiving 36 percent of the vote. But, Santorum easily beat Paul among other age groups 17-49.
More educated voters largely chose Romney.
People making $100,000 or less largely went for Santorum.
Santorum also won among Democrats and Independents. However, Romney won 42-36 among Republicans. Of course, Republicans accounted for an overwhelming amount of the electorate (68 percent).
Santorum won over Romney among people describing themselves as conservative 40-36. Romney fared better among people calling themselves moderate or liberal, earning 42 percent of that vote to Santorum's 28 percent.
Romney won among people who said the most important quality in a candidate was his "ability to beat Barack Obama" or one who "had the right experience."
Santorum drew support from people looking for a "true conservative" or for someone with "strong moral character."
Santorum beat Romney 41-35 among people who made their decision today about whom they would support.
Gas prices mattered to a lot of voters. The poll found 74 percent said gas prices were important to their vote. In all, 93 percent said gas prices were a factor. Romney barely edged out Santorum among people who cited the issue.