Democrats in Nevada are moving away from Sen. Elizabeth Warren and former Vice President Joe Biden according to a recent poll. And Sen. Bernie Sanders and others are gaining ground ahead of the state's February 22 caucus.

A Suffolk University and USA Today Network poll published Tuesday found that nearly one fifth, 19.4% of Nevada voters state they will vote for Biden in the state's Democratic caucus , while 17.6% will do so for Sanders, a small difference that is within the poll's margin of error.

Warren trails in third with 10.6% of Nevada voters' support.

Despite Biden edging out Sanders, support for the former vice president has dropped four points since a poll conducted in September, while support for the Vermont senator has increased four points.

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Warren dropped the most, with a decrease of eight points since September.

Former South Bend, Indiana, Mayor Pete Buttigieg and billionaire businessman Tom Steyer round out the top five with 8.2% and 7.6%, respectively. Both candidates gained five points since the September poll.

About one-fifth of Nevada caucus voters remained undecided on which candidate they would vote for in the Democratic caucus on Feb. 22.

When it comes to the issues, 21.8% of Democrats say health care is the most important issue, followed by climate change at 13.6% and the economy at 10.4%. About 4% of voters say the most pressing issue affecting their support of a candidate is the ability to beat President Donald Trump.