Washington (CNN) Democratic presidential candidate Sen. Bernie Sanders is well ahead of the rest of the field for the Democratic national primary after strong showings in Iowa and New Hampshire, according to a new CNN Poll of Polls on the race.

Sanders, a Vermont independent, is leading the pack as the candidates head to the Nevada caucuses with 28% of support among registered Democrats and Democratic-leaning independents or likely Democratic voters. Following behind him is former Vice President Joe Biden with 16%, former New York Mayor Michael Bloomberg with 15% and Massachusetts Sen. Elizabeth Warren with 13%.

Former South Bend, Indiana, Mayor Pete Buttigieg's support stood at 10%, while Minnesota Sen. Amy Klobuchar's was at 7% and businessman Tom Steyer's was at 2%.

The poll of polls includes an average of the five most recent nonpartisan, live operator, national surveys on the race for the Democratic presidential nomination conducted among registered voters who either consider themselves Democrats, Democratic-leaning independents or likely Democratic voters. The surveys were conducted after voting in the Iowa caucuses began on February 3.

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