Pollster Ratings - Iowa State University

Iowa State University

Pollsters with a relatively small number of polls now receive a provisional rating rather than a precise letter grade.

B/C

Polls analyzed	3
Races called correctly	67%
Most recent cycle	2016
Affiliated with professional polling organization (NCPP/AAPOR/Roper)	No

Polls conducted within 21 days of an election (based on the poll’s median date) are used to determine the pollster’s grade.

Key

A = Adults

RV = Registered voters

V = Voters

LV = Likely voters

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Jan 5-22	283LV	President (IA) Republican primary	Live Phone	Poll Cruz (R) +6.9	Actual Cruz (R) +3.3	Difference 3.6
Jan 5-22	356LV	President (IA) Democratic primary	Live Phone	Poll Clinton (D) +2.4	Actual Clinton (D) +0.3	Difference 2.1

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Dec 8-18	333LV	President (IA) Republican primary	Live Phone	Poll Romney (R) +13.0	Actual Santorum (R) +0.0	Difference 13.0