The poll was conducted Dec. 3–6. Monmouth gets an A- rating from 538. The sampling methodology for this poll was not the same as Monmouth University’s previous Iowa poll conducted in late October. More details about this below.
Summary and details from Monmouth University
Clinton |
55% |
Sanders |
33% |
O’Malley |
6% |
Sample: 405 likely Iowa Democratic caucus goers
Margin of error: +/- 4.9%
In the current poll, just over half of the respondents were previous caucus participants. The remainder were registered voters (including registered voters and independents) who said they planned to participate in the Democratic caucuses. 38% of respondents were contacted by cellphone.
Sanders leads 48% to 38% among voters under 50 (32% of the sample). Clinton leads 63% to 26% with voters 50 and older. Clinton and Sanders were tied among independents who planned to participate in the Democratic caucus (14% of the sample).
“Undecided” was not provided as an option, but respondents were also asked about their strength of support. 10% said they were undecided, and 11% said they had only a “slight preference” for the candidate they selected.
Among previous Democratic caucus attendees only, comparable to the group sampled for Monmouth’s October Iowa poll, Clinton received 57% support, Sanders 30%. In October, their results were Clinton 65% Sanders 24%.