Clinton leads Sanders in Florida and Ohio, trails in Illinois
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Hillary ClintonHillary Diane Rodham ClintonGrassley blasts Democrats over unwillingness to probe Clinton GOP lawmakers cite new allegations of political bias in FBI Top intel Dem: Trump Jr. refused to answer questions about Trump Tower discussions with father MORE holds leads in Florida and Ohio just days before voters head to the polls, according to a new online poll.

Clinton leads rival Bernie SandersBernard (Bernie) SandersSchumer: Franken should resign Franken resignation could upend Minnesota races Avalanche of Democratic senators say Franken should resign MORE by 28 points in Florida, 62 to 34 percent, and by 9 points, 52 to 43 percent in Ohio in the CBS News Battleground Tracker poll released Sunday morning.

The Vermont senator, however, narrowly leads the former secretary of State in Illinois, 48 to 46 percent.

Pollsters noted that Sanders leads among white voters in Illinois and is backed by almost one quarter of African-Americans. He also is seen as more honest and trustworthy.

The poll of likely Democratic primary voters has a 4.5 percent margin of error in Florida, a 5 percent margin of error in Ohio and a 5.5 percent margin of error in Illinois.

Clinton leads Sanders by 31 points in Florida, according to a RealClearPolitics average of polls that also shows her ahead of Sanders by almost 18 points in Ohio and almost 14 points in Illinois.

--This report was updated at 12:48 p.m.