Sanders' Super Tuesday focus evident in travel outside South

A win gives her momentum heading into their big super Tuesday showdown and ABC's David Wright will give us that side of the story.

Today, South Carolina voters can choose between former Secretary of State Hillary Clinton and Vermont Sen.

Voting is underway in South Carolina's Democratic presidential primary, and Hillary Clinton is looking for a big victory - and to win big over rival Bernie Sanders. But Sanders built a strong ground game in SC and began to invest time in the state and steadily closed the gap to the low 20s in polls conducted in the last two weeks.

In South Carolina, Clinton's campaign has worked hard to hammer home the message that she is the only candidate who can break down barriers still preventing minorities from getting ahead.

Some Clinton supporters say Senator Sanders, a transplanted New Yorker and self-declared democratic socialist who now represents Vermont, is little known in the south.

For his part, Sanders is working at making inroads with South Carolina's African-American voters, who make up more than half of the Democratic-voting population in that state.

Kevin Alexander Gray, a SC activist and author of "Waiting for Lightning to Strike: The Fundamentals of Black Politics", said some of Sanders' wounds were self-inflicted.

In her rally, the 68-year-old Clinton targeted Sanders, accusing him of having voted in the past in favor of a loophole that eventually allowed the church shooter to obtain a firearm.

Clinton's favorability rating is only slightly better than her trustworthiness numbers at 43 percent, which is three points higher than Saunders' favorability ratings which polled at 40 percent.

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Polls are open from 7 a.m. until 7 p.m. In South Carolina, you must have a valid photo identification to vote.

In both Iowa and New Hampshire, where the electorate is overwhelmingly white, Sanders won 80 percent of voters under age 30, and 55 percent of those between 30 and 44-years-old.

Clinton has camped out in the state all week, protecting her lead.

As late as December, it appeared Clinton was primed to run away with the SC primary.

SC is the first state from the South to weigh in for Democrats and the most delegate-rich state to vote so far.

The local Clinton campaign has 25 volunteers ready to go, she said.

Sanders, he wrote, is "leading a movement to reclaim America for the many, not the few", with his "political revolution" being "the only means by which we can get the nation back from the moneyed interests that now control so much of our economy and democracy". "I've met people from multiple Senate districts, and what's cool about our organization is that we have organizers stretched from Kansas City to Dodge City", said Lauren Brainerd of Wichita, state director of the Clinton campaign. Of the 2,383 delegates needed to win the nomination, Hillary Clinton already has more than 500, including roughly 450 superdelegates.

Another sore point for the Clinton campaign is the FBI investigation into her use of a private email server during her tenure as secretary of state.

Both campaigns also are targeting independent voters, who are eligible to vote in the state's Democratic primary for the first time in modern history. Clinton lost the state overwhelmingly to Obama in a heated contest where her husband, former President Bill Clinton, was seen by some as questioning the legitimacy of the black presidential contender.