It's a tighter race now for the Democratic presidential nomination in early primary states.
Senator Bernie Sanders of Vermont is gaining ground on Hillary Clinton in the polls in Iowa.
A new poll from the Des Moines Register and Bloomberg Politics has Sanders at 30 percent support.
Clinton leads at 37 percent, but she has lost a third of her supporters in Iowa in the last three months.
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The new numbers show a surge in support for Sanders.
The outspoken progressive senator from Vermont polled at just 5 percent support back in January.
It's not the only poll that shows what's called the "Sanders Surge." In New Hampshire earlier this month, the Franklin Pierce University/Boston Herald Poll showed Sanders pulling ahead of Clinton for the first time among NH voters.
Iowa and New Hampshire at the earliest primary/caucus states.
Clinton continues to enjoy heavy support in national polls but analysts do see some vulnerabilities.