There’s some indication that Warren and Sanders suffered fallout from their recent spat — including during and after last week's debate — over whether a woman could beat President Donald Trump. Warren contended Sanders told her in a private 2018 conversation that he did not believe a woman could win, which Sanders denied.

When asked if there was a candidate they would not support based on the debate,
12 percent of those surveyed said Warren and 11 percent said Sanders. The next highest was billionaire Tom Steyer at 4 percent.

When asked who would best represent the interests of rural Iowa, Klobuchar was the clear favorite with 29 percent.

Also in the survey, Democrats were asked what they would do if their first choice in the caucuses were not viable. While 75 percent said they would realign with another candidate, 17 percent said they would remain uncommitted and 4 percent said they would go home.

“It is significant the 17% [who] say they will remain uncommitted and may indicate that uncommitted will be viable in several precincts," a statement from the group says.

Of those who choose another candidate, Biden received 24 percent support, Buttigieg received 21 percent, Warren received 16 percent, Klobuchar received 7 percent, and Sanders received 6 percent.