GOP presidential candidate and former Massachusetts Gov. Mitt Romney greets supporters at a Super Tuesday night gathering in Boston. Photo by Justin Sullivan/Getty Images. "I'm going to get this nomination," Mitt Romney told elated supporters in Massachusetts Tuesday night. Mathematically,…

GOP presidential candidate Mitt Romney and his wife, Ann, talk to members of the press on his campaign's plane Tuesday in Columbus, Ohio. Photo by Justin Sullivan/Getty Images. Former Massachusetts Gov. Mitt Romney pulled out a narrow victory in…

Poll workers look on during Super Tuesday voting in Youngstown, Ohio. Photo by Mario Tama/Getty Images. Voting ended at 7:30 p.m. ET across Ohio, where exit polls showed a tight race between former Massachusetts Gov. Mitt Romney and former Pennsylvania…

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Rick Santorum campaigns in Lake County, Ohio, last week. Photo by Jim Watson/AFP/Getty Images. This Tuesday is "super" in the Republican nominating battle because of sheer volume. There are 11 states holding votes and more than 400 delegates at stake.

Wall at Romney campaign headquarters in Columbus, Ohio. Tweeted by PBS NewsHour politics producer Terence Burlij. The PBS NewsHour politics team has been reporting on the run-up to Super Tuesday, including on-the-ground reports from Ohio. Take a look back…