Poll: Clinton leads in Iowa by 22 points

David Jackson | USA TODAY

Hillary Clinton holds a wide lead over Sen. Bernie Sanders among likely Democratic caucus attendees in Iowa, according to a new poll released Tuesday.

The Monmouth University Poll has Clinton at 55% and Sanders at 33%, with Martin O’Malley in third place at 6%.

“The core of this electorate is going to be registered Democrats,” said Patrick Murray, director of the independent Monmouth University Polling Institute in West Long Branch, N.J. “And Clinton appears to have that group firmly in her corner.”

The Iowa caucuses are Feb. 1.

The Monmouth poll warned that turnout for the Iowa caucuses is very unpredictable: