A new poll puts Democratic presidential candidates Bernie Sanders and Hillary Clinton in a dead heat in Nevada, a state where Clinton had been several points ahead of the Vermont senator.According to a Washington Free Beacon/TargetPoint Consulting poll of 1,236 likely Democratic caucus goers, the two candidates are tied at 45 percent each, reports The Hill.But in December, a Gravis poll in Nevada showed Clinton up by 23 percentage points, and at various times in 2015, she lead him by as much as 54 points.The Free Beacon and TargetPoint are both conservative-leaning, but Clinton's campaign this past week also said it was worried that Sanders was advancing in Nevada, The Hill reports.“You have a caucus-style format, and he’ll have the momentum coming out of New Hampshire, presumably, so there’s a lot of reasons he should do well,” Clinton campaign spokesman Brian Fallon said. "There’s reason to believe the race will tighten even there.”