Two different media companies, two different Cook County Board president polls, two widely different results. The reason? Most likely it’s because the Tribune poll is recent and has a reasonable sample size, while the Daily Herald/ABC7 poll is ancient and has a tiny sample size.
First, the Tribune poll of 484 likely voters conducted Thursday through Sunday:
Stroger leads Peraica 48 percent to 33 percent with 17 percent of voters undecided—a significant gain for the Democrat since a similar poll about three weeks ago showed the contest a virtual tie.
While Stroger has surged, Peraica’s support has slipped among voter groups who are key to his chances, according to the poll of 484 likely voters conducted Thursday through Sunday. The poll has an error margin of 5 percentage points.
The new poll shows Todd Stroger increasing his advantage among city voters beyond what had already been a significant margin. The survey found 62 percent of city voters back Stroger, compared to 50 percent almost two weeks ago. At the same time, Peraica’s support in the city was essentially unchanged at 24 percent. […]
The survey found 63 percent of Democrats now say they support Stroger, up from 59 percent in the previous poll. Stroger’s support among African-American voters increased by 4 percentage points, to 79 percent.
Peraica’s edge among suburban Cook County voters has slipped to 44 percent from 48 percent, while Stroger’s suburban support rose to 32 percent from 28 percent.
Meanwhile, the latest Daily Herald/ABC poll is of just 300 voters taken Oct. 16 to 22, meaning the margin of error is plus-or-minus 6 percentage points and some results are more than two weeks old. So, the poll doesn’t take into account many of the ads that have been aired by Stroger or much of the field work by the Democratic machine.
Even though many don’t know him, Republican board member Tony Peraica led Democratic pinch hitter Todd Stroger by 9 percentage points, 51 percent to 42 percent, the Daily Herald/ABC7 Chicago poll found.
To know Stroger apparently is to not love him, poll results show. Stroger, a Chicago alderman chosen to replace his father on the ballot after the primary, was known to 87 percent of those surveyed, but supported by less than half of them. On the other hand, Peraica was unknown to 42 percent, but still favored by more than half of those polled.
“If people know Stroger and not Peraica, they’ll vote for Peraica,” said Richard Day, whose Evanston-based firm conducted the poll. “It’s remarkable.” […]
Stroger was viewed unfavorably by more than half of those polled, 53 percent, and favorably by 24 percent - a 2-to-1 negative margin. Peraica was thought of unfavorably by 24 percent and favorably by 39 percent, with 42 percent unfamiliar with him.