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Mitt Romney's failure to secure a decisive victory on Super Tuesday underscores lingering questions about his candidacy and almost guarantees the Republican presidential nomination will stretch on.

Capping victories in five other states Tuesday, Mitt Romney won Ohio's Republican primary, narrowly beating Rick Santorum. But with the win come questions about Romney's campaign strategy and the candidate's appeal.

Republican presidential frontrunner takes five out of 10 states but Rick Santorum stays in the running.

Mitt Romney has won the 2012 Ohio Republican primary, passing Rick Santorum by an incredibly slim margin to take the state after a tight race between the two candidates. But what does the victory say about how Romney's campaign strategy appealed to voters in Ohio, and how many delegates the win will net him for Super Tuesday?

Rick Santorum has been projected winner of the Oklahoma primary.

Georgia, where Gingrich launched his political career, was a must-win state for the ex-House speaker. It's the anchor of his strategy of defeating rivals in the Deep South after a string of primary defeats elsewhere.

He and Ron Paul were the only ones on the ballot.

Where to watch Tennessee primary results.

Vermont is one of 10 states that will be holding its Republican presidential contest Tuesday night on one of the most important and revealing evenings of the 2012 GOP nomination process.

Virginia is one of 10 states that will be holding its Republican presidential contest Tuesday night on one of the most important and revealing evenings of the primary.

Dick's Sporting Goods (NYSE: DKS) on Tuesday matched expectations for its fourth-quarter net income, bolstered by an increase in the number of stores.

U.S. drug wholesaler AmerisourceBergen Corp. said Tuesday it will pay $520 million in cash to buy privately held World Courier Inc., a global specialty transportation and logistics provider for biopharmaceutical companies.

The progressive icon from Ohio could lose his long-held congressional seat to fellow Ohio incumbent Marcy Kaptur in a Democratic primary that is among Super Tuesday's slate of contests.

Super Tuesday will test the strength, support and stamina of the four Republicans still standing: Mitt Romney, Rick Santorum, Ron Paul and Newt Gingrich. For each of the 10 states up for grabs on March 6, here is a rundown of the latest polling data and a look at what's at stake and who stands the best chance of winning.

Mitt Romney can take a big step toward finishing off chief rival Rick Santorum and seizing command of the Republican presidential race Tuesday as 10 states hold contests with Ohio at ground zero.

Fallout over Rush Limbaugh calling Georgetown Law School student Sandra Fluke a slut and a prostitute is now hurting the conservative radio show host among his core audience, according to a new poll released today.

Operation Hilarity, which encouraged Democrats to vote for Rick Santorum, the forum Pennsylvania senator, in last week's Michigan primary, is the brainchild of the popular left-wing blog Daily Kos.

Many counties have stopped adding fluoride to their water supply, citing health risks the CDC says simply aren't there.

Only 8.6 percent of Greeks polled held a favorable view of the Germans (who, not coincidentally, happen to be Athens’ largest creditor).

The much beleaguered people of Greece have apparently turned the bulk of their anger upon Germany, the most powerful economy in Europe.

Getting the government out of education has become a recurring theme during the 2012 Republican presidential primary, and Rick Santorum has embraced it by emphasizing his decision to home school his children.