Bernie SandersBernie SandersJimmy Carter: 'I hope there's an age limit' on presidency 2020 candidates keep fitness on track while on the trail Mark Mellman: The most important moment in history? MORE supporters on Saturday booed while watching Hillary ClintonHillary Diane Rodham ClintonGOP struggles with retirement wave Overnight Energy: Trump to revoke California's tailpipe waiver | Democrats propose bill to revoke Trump endangered species rollback | Trump officials finalize rule allowing fewer inspectors at pork plants Mark Mellman: The most important moment in history? MORE's victory speech at an event in Henderson, Nev., as they waited for the White House hopeful to take the stage. 

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"We are all in this together. We all have to do our part," Clinton said as Sanders's voters loudly booed at the screen moments after the former first lady was declared the winner of the Democratic Nevada caucuses. 

Clinton ultimately pulled ahead of the Vermont Independent in a tight race Saturday, claiming about 52 percent of the vote with 78 percent of precincts reporting. 

The former secretary of State is expected to win big again in the South Carolina primary on Feb. 27.