Hillary Clinton is looking set to sew up the Democratic presidential nomination on Super Tuesday as polls show her leading Bernie Sanders 2-1 in key states.

It comes after Clinton coasted to a win in South Carolina on Saturday, beating Sanders by a staggering 50 points as a record-breaking number of black voters came out to support her.

Meanwhile, Sanders remained optimistic on the campaign trail despite admitting 'we got decimated' in the Palmetto State.

According to a trio of new NBC News/Wall Street Journal/Marist polls, Clinton is leading in the Super Tuesday states of Georgia, Texas and Tennessee.

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Hillary Clinton is looking set to sew up the Democratic presidential nomination on Super Tuesday as polls show her leading Bernie Sanders 2-1 in key states. Pictured, Clinton speaks during a service at the Mississippi Boulevard Christian Church in Memphis, Tennessee, on Sunday

According to a trio of new NBC News/Wall Street Journal/Marist polls, Clinton is leading in the Super Tuesday states of Georgia, Texas and Tennessee

Clinton is ahead of Sanders in Georgia by 34 points among likely Democratic primary voters, 64 percent to 30 percent.

In Tennessee, she leads by 26 points, 60 percent to 34 percent. And in Texas, she’s up by 21 points, 59 percent to 38 percent.

Clinton holds at least a 20 point lead in three of the key states - Georgia, Texas, and Virginia, according to CBS News' Battleground Tracker, a poll conducted by YouGov.

The study found white voters are somewhat divided between Clinton and Sanders in these three states, but three in four black voters are supporting Clinton.

Clinton has a lead among voters aged 45 and older. Men are divided between the two candidates, but Clinton has a strong lead among women.

Meanwhile, Donald Trump is leading in Georgia and Tennessee, while Ted Cruz is ahead in his home state of Texas, according to the NBC News/Wall Street Journal/Marist polls.

CBS News' Battleground Tracker also puts Trump up in Georgia and Virginia and second in Texas.

In Tennessee, Clinton (pictured speaking at a Tennessee church on Sunday) is leading Sanders by 26 points

Clinton clasps hands with pastor Bill Adkins (left) after speaking during a church service at the Greater Imani Cathedral of Faith in Memphis, Tennessee, on Sunday

Democratic candidate Hillary Clinton arrives to speak at Broadmoor Baptist Church in Memphis, Tennessee

And in an interview with CBS's Face the Nation, Sanders discussed his strategy ahead of Super Tuesday, insisting he will win in a number of states including Minnesota, Colorado and Vermont.

'I think we're going to win here in Minnesota, I think we're going to win in Colorado, I think we're going to win in Oklahoma, I think we're going to do really well in Massachusetts and I think we're going to win in Vermont,' he said.

'And I think we've got a number of states coming up that we're going to do extremely well and possibly winning, including California and New York State. So I think we do have a path to victory.'

However, Sanders conceded he was 'beaten very badly' in South Carolina and congratulated Clinton on her victory.

But he told host John Dickerson: 'I think for us that is about as bad as it's going to get.'

Bernie Sanders remained optimistic ahead of Super Tuesday despite admitting 'we got decimated' in the Palmetto State

It comes after Clinton coasted to a win in South Carolina on Saturday, beating Sanders by a staggering 50 points as a record-breaking number of black voters came out to support her

When Dickerson said Sanders needed to attract African-American voters, which clearly did not hit home in South Carolina, Sanders admitted: 'Well, no question, I mean, let me be really clear, we did really, really badly with older African American voters. I mean, we got decimated.'

But he added: 'On the other hand, if you look at the younger people, African-American younger people and whites, we did much better.'

Clinton had been up by nearly 30 points in the polls and a victory for her in South Carolina was a near certainty coming into primary day.

With 100 percent of the ballots counted, she had a 73.5 percent share of the vote to Sanders' 26 percent.

The former secretary of state’s lead over Sanders was so large that the race was called for her within minutes of polls closing.

'Tomorrow this campaign goes national!' Clinton exclaimed at a victory rally at the University of South Carolina in Columbia.

Expecting a loss, Sanders had already left the state and was in Rochester, Minnesota, when the tally came in.

He swiftly sent out a statement that congratulated Clinton yet claimed the 'campaign is just beginning.'

Sanders discussed his strategy ahead of Super Tuesday, insisting he will win in a number of states including Minnesota, Colorado and Vermont

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And he hit Donald Trump, the leading GOP candidate, and said: 'When we come together, and don't let people like Donald Trump try to divide us, we can create an economy that works for all of us and not just the top one percent.'

Clinton also jabbed Trump in her remarks on Saturday night.

'Despite what you hear, we don't need to "Make America Great Again" - America has never stopped being great,' she said to uproar of applause from her supporters.

When the applause died down, Clinton said: 'But, we do need to make America whole again.

'Instead of building walls, we need to be tearing down barriers,' the Democrat added.

A theme of her swing through the south - 'breaking barriers' - Clinton mobilized African-American voters to come out for her in force.

In exit polling, blacks accounted for a 61 percent of the vote - up from the 2008 record of 55 percent.

Clinton won 86 percent of those voters, outpacing President Barack Obama's total share of the black vote when they ran against each other by six percent.

In 2008, he won 78 percent of black voters to Clinton's 19 percent.

Clinton hit a coffee shop in Nashville, Tennessee, on Sunday to meet supporters, a day after declaring 'this campaign goes national!' following her win in South Carolina

Democratic presidential candidate Hillary Clinton greets people at Fido coffee shop in Nashville, Tennessee

A record-breaking number of blacks voted in today's primary - and Clinton won 84 percent of them, according to exit polling, which sets her up to sweep the southern states on Super Tuesday

On Saturday, 88 percent of blacks said they trusted Clinton to handle race relations compared to 48 percent who said that of Sanders - a striking number that doesn't bode well for him in upcoming states with significant minority populations.

At the same time, Clinton lost white voters, and her perceived honesty level was a factor. Just 52 percent said they think the ex-Obama official who kept government emails on a secret server in her home is trustworthy.

Dragging Sanders' numbers down was the number of young people who voted. The under-30 crowd accounted for 15 percent of the vote in South Carolina, a decline of several points from other early voting states.

Sanders did his best to project calm as he acknowledged Clinton's win in a written statement.

'We won a decisive victory in New Hampshire. She won a decisive victory in South Carolina. Now it’s on to Super Tuesday,' he said.

'In just three days, Democrats in 11 states will pick 10 times more pledged delegates on one day than were selected in the four early states so far in this campaign.

'Our grassroots political revolution is growing state by state, and we won't stop now.'

Democratic presidential candidate Hillary Clinton speaks at Meharry Medical College on Sunday as her campaign prepares for Super Tuesday

Woman of the people: Clinton takes pictures with supporters inside the Fido coffee shop in Tennessee

Presidential candidate and U.S. Senator Bernie Sanders speaks at a campaign rally in Oklahoma City amid predictions that he could lose badly on Super Tuesday

In the past week, Sanders has shifted his attention to states that have contests on Tuesday and beyond as he tries to keep his campaign afloat.

He spent the day in Texas. On Sunday, he has events in Oklahoma and Colorado.

Meanwhile, Clinton will rally her supporters in Tennessee in the afternoon before she returns to the state where she and husband Bill cut their political teeth in the 1980s: Arkansas.

The Vermont senator dipped in and out of South Carolina this week and held rallies in Kansas City, Missouri, Tulsa, Oklahoma, Ohio's Cuyahoga County, near Cleveland, Hibbing, Minnesota, Flint, Michigan and Chicago, Illinois, in between.

Clinton mostly stuck to South Carolina despite her huge lead here but used the primary day lull to make a side trip to Birmingham, Alabama, which sends its voters to the ballot box on Tuesday.

Bernie Sanders takes selfies with the crowd during a campaign rally at the Cox Convention Center Arena in Oklahoma City on Sunday

Bill Clinton also turned out to stump for Hillary today in Miami Gardens, Florida, just a day after causing controversy by telling a veteran heckler to 'shut up' at another rally

Clinton told supporters that wife Hillary is the only presidential candidate who will deliver real change for working families across America if she wins the White House

On Friday, she dashed across the South Carolina border to Atlanta, Georgia, for a lunchtime stop at city hall, then hurried back for an early evening rally in Orangeburg. She ended the night with a concert in Columbia with British singer Estelle.

She and Bill split up the must-win state in the week leading up to the primary, with the former president primarily in the northwest and the ex-secretary of state stumping in the east and the south.

After closer than expected races in Iowa and Nevada and a big victory for Sanders in New Hampshire, she had just one more pledged delegate than the U.S. senator prior to the South Carolina win.

They were virtually tied 52-51, leaving no room for error in other states Clinton is supposed to win.

She held a comfortable lead over Sanders in South Carolina and was an average of 28 points ahead, but she worked aggressively to seal the deal this week at more than a half dozen events inside the state.

The state holds a strong African-American voting block and 55 percent of Democrats who voted in the 2008 primary were black.

In the days leading up to the primary, Clinton campaigned with Sybrina Fulton, the mother of Trayvon Martin, Geneva Reed-Veal, the mother of Sandra Bland, Gwen Carr, mother to Eric Garner, Maria Hamilton, mother to Dontre Hamilton and Lucy McBath, mother to Jordan Davis.

Garner's sister, Erica, has meanwhile endorsed Sanders and has cut a campaign video and campaigned in person for him.

Clinton supporters wear campaign t-shirts during a rally at Meharry Medical College in Nashville, Tennessee

A cancer survivor introduces U.S. Democratic presidential candidate Hillary Clinton as she rallies with supporters at Meharry Medical College in Nashville

Sanders didn't abandon South Carolina entirely despite his slim odds there.

He showed up at a luncheon for Brookland Baptist church last Sunday in Columbia with former NAACP head Ben Jealous and held a press conference on poverty the next morning before making his exit.

On Monday and Tuesday, Sanders campaigned in Massachusetts, where he's tied with Clinton in the newest Emerson poll and Virginia, which shows Clinton with a large double-digit lead. Both states vote on March 1, Super Tuesday.

His wife Jane stayed behind to host an education forum in Columbia, while Sanders sent actor Danny Glover out to campaign for him in Charleston on Monday.

Sanders came back to South Carolina last night for two rallies then departed again early this morning for his Texas trip.

The Sanders campaign did not respond to requests for comment from DailyMail.com this week on the senator's future travel and what it indicated about his prospects in South Carolina.

The writing was on the wall, though, as he hit up several other states he could still win in lieu of wooing South Carolina voters.

Supporters listen to Hillary Clinton speak during a rally in Nashville, Tennessee, as figures show she is likely to win large sections of the black vote in upcoming primaries and caucuses

Clinton poses for a picture with a supporter at the Fido coffee shop in Tennessee on Sunday

Democratic presidential candidate Hillary Clinton stops to greet people at Fido coffee shop in Nashville

On Monday, before he booked it out of the state until Friday, Sanders tried to appeal to the state's low-income, black and Hispanic residents.

'The United States today has the highest poverty rate of nearly any major country on earth because almost all of the new wealth and income is going to the people on top,' he said.

'The poor remain invisible, powerless, not heard from. Most don’t even vote.'

South Carolina has a 27 percent poverty rate, including 138,000 black children and 34,000 Hispanic children, he said.

Not enough Hispanic voters hit the ballot box today for worthy exit polling. When it comes to income, however, Clinton won every bracket.

And she won majorities of both men and women, cutting into Sanders' typically solid lead with voters of his own sex.

The race now shifts to Alabama, the American Samoa, Arkansas - where Clinton served as first lady - Colorado, Georgia, Massachusetts, Minnesota, Oklahoma, Tennessee, Texas, Virginia and Vermont - Sanders' home state.

He plans to await his fate in the race there on Tuesday in Burlington, where he held his first elected office as mayor and he still resides.

In addition to Super Tuesday states, Sanders is hitting up ones that vote on March 15 - Missouri, Oklahoma, Ohio and Illinois, which vote March 15.

Senator Bernie Sanders hugs his wife Jane after speaking at a campaign rally in Oklahoma City, Oklahoma