Wednesday, June 18, 2008

Afternoon Polling Update, 6/18

So many polls, so little time! This is everything that's been released today, including the results from our morning edition.



Let's begin in Ohio, where Rasmussen's latest data contradicts the notion that Barack Obama is surging in the state. He still trails John McCain by one point in their polling; McCain had also led by one point in their May survey. There are several factors to consider here. Firstly, this poll postdates the Quinnipiac poll by a few days. I'm not yet convinced that Obama's bounce is receding, in part because there haven't really been any intervening news events to give some momentum back to John McCain, but that's always something to keep in mind. Secondly, some of the pollsters (like SurveyUSA and PPP) that had shown Obama leading in Ohio by fairly large margins tend to have a more fluid/less grounded conception of party identification than does Rasmussen. In Ohio, they're finding a huge shift in party identification, with as much as 50 percent of the state identifying as Democrat, and running with those numbers as is. Since SurveyUSA and PPP identify a lot more Democrats in their sample, and since much of Obama's bounce appears to be in the form of bringing Democrats back home to their party, it is not surprising if they are showing more movement toward him.

Unfortunately, there are no definitive answers about how one should measure party idenitifaction, and we won't really know who got it right until November. At a gut-feel level, it's hard not to imagine Ohio being somewhat close. At the same time, Obama's problems in the state had stemmed from his poor performance in Southern Ohio, which is part of Appalachia. And this is the region in which his bounce appears to be most profound: his polling has improved by 12 points in Kentucky and 15 in Arkansas, and he took some huge steps forward in Southern Ohio in Quinnipiac's regional breakdown.

Other Rasmussen polling does show a bounce for Obama. In Maine, he's ahead by 22 (up from 13 a month ago), and in Alaska, he trails McCain by just 4 points (down from 9 a month ago). There is certainly some novelty value in the notion of a Democrat competing in Alaska. But it's a state that the Obama campaign ought to be taking reasonably seriously: Alaska is the the youngest state in the country in a year where we have the largest-ever age gap between the two nominees. Indeed, it's probably time for Obama to visit Alaska. I don't have any numbers on this, but I would guess that candidate visits make more difference in smaller states, and particularly those that are out of the way geographically. If Obama visits Alaska, it will create a ton of earned media, and McCain will probably have to follow him to defend the state.

The notorious A.R.G. (American Research Group) is out with their first general election polling of the year; they have Obama leading by 5 points in Florida, and 12 in New Hampshire. You probably know that I don't have the highest opinion of ARG, but in their defense, their general election polling has tended to be pretty decent -- it's their primary polling that has been a mess. I do not, incidentally, find the New Hampshire result implausible, precisely because New Hampshire has some history of overreacting to current trends. With few New Hampshirites fitting into hard-and-fast demographic categories, and many of them identifying as independents, there is probably a higher fraction of swing voters there than any other state in the country. So as the country swings, New Hampshire swings twice over.

Finally, two results that tend to confirm our current impressions in a couple of states. In Virginia, Public Policy Polling has Obama ahead by 2 -- this is their first poll of the Commonwealth -- and in Wisconsin, SurveyUSA has Obama ahead by 9, up from 6 last month.

39 comments

Anonymous said...

What is going on in the EV distibution chart on the right hand side?

asmodeus said...

Woohoo! All good.

Anonymous said...

anon:

I believe it's just a histogram of the number of EVs that Obama gets in their 10,000 simulation runs. Think of it as a probability distribution for the number of EVs he'll get. The coloring simply reflects the fact that if Obama gets below 269, McCain wins.

Personally, I find the red/blue coloring distracting, and would simply plot the histogram in a neutral color with a vertical line at 269.

Ned said...

By "less fluid conception of party ID", do you mean that SurveyUSA/PPP don't weight by party ID, or that they do weight by party ID, but they weight differently.

(I'm assuming Rasmussen does weight by party ID...)

Ned said...

Sorry- I meant "more fluid", not "less fluid".

Alex said...

I'm pretty sure they don't weight by party ID, Ned. If you read the PPP report for Ohio, it states the party ID question as just another question posed to the random sample, rather than something imposed upon the sample.

asmodeus said...

Advice: reduce clutter on the front page and archive things up so people can see what you were predicting when so they can see if you're cred or not. Ciao.

jdkbrown said...

I'm guessing that the first Anonymous is referring to the spike in the histogram at what looks like 536 EV or so. I've been wondering about it too. It seems like it should a fantastically unlikely result, and it's out of line with the results around it.

Anonymous said...

agree with asmodeus, at least have graphs shoing how your projection for each state changes over time

Anonymous said...

Nate - I've also read that it's possible that the enthusiasm gap means that Obama supporters are more likely to answer polls than McCain supporters, which is skewing the results in Obama's favor. What's your take on that idea? Is it possible?

Aaron said...

Anonymous/asmodeus:

Nate used to have a win-percentage tracker until the most recent update. He said that he will bring it back once he has retrofitted the old data to the new model.

Anonymous said...

Re Anon at 00:51 UTC+1 about enthusiasm gap -

There was a similar effect in polls during the past decade in the UK, with 'shy Tories' who support the Conservative party skewing the raw figures in favour for the Labour party. I wonder how much study has been done to a similar effect here.

Lorne Guyland said...

Ah, good to see that "Pacific" has re-appeared on the State breakdown. CA, WA, OR & HI haven't seceded from the union after all! ;)

Anonymous said...

Anon at 6:51: I'll just jump in here, and say that if McCain supporters can't be bothered to answer polls, then what are the odds they'll actually vote?

Cugel said...

If the party ID is trending anything in 2008 it's going to be trending more Democratic not less, so an assumption of a fixed party I.D. would understate Obama's vote. How much however remains to be seen.

I thought you said that party I.D. was relatively fixed Nate? If it varies wildly from state to state like they're finding in Ohio then all bets are off and I don't know how to read the polling.

Best guess seems to be that the real Obama bounce in Ohio is about where you have it: around 7% -- I.E. somewhere closer to the Quinnipiac survey at +6 than the PPP survey at +11. Further polls will give us a better idea.

If the Rassmussen poll continues to be an outlier, will they adjust their party I.D. in future polls? Or will they stick it out and risk the exposure?

I'd be a lot more worried if SurveyUSA wasn't also showing Obama +9 in their last poll a month ago in May. But, with 3 out of the last 4 polls showing a significant Obama bounce in Ohio, it's safe to say he's ahead there.

I also notice that Qunnipiac's survey is more than double the size of Rassmussen's. It may just be that the Rassmussen poll just fell into that 5% that isn't within the margin of error. I.E., it's an outlier.

As for Florida, I'm astounded at how Obama has bounced into the lead in the last 2 polls. McCain's campaign didn't even think Florida was going to be a battleground state! And now they're trailing!

Anonymous said...

Obama Pollster Pimp O-P-P

what my homies are callin me

i can turn red states into blue

with regression analysis version 2

gonna go to chi town to find a crib

gonna become a high paid marxist lib

should i live by reverend wright?

gated golf course community, i've seen the light

or how bout hyde park next to Mr. O

i'll get a loan from tony rezko

i'm just doing the best i can

first time ever proud to be an american

who ever though fudgin numbers could be so good?

gonna be livin in a rich white people neighborhood

gotta go now let me be

Obama Pollster Pimp O-P-P

I am a Fractal said...

nate,

every time i click on your site, the numbers change, and i can't remember each time if they are better or worse!

it would be so nice to have a "previous/next" button set or a little scroll bar to be able to animate your pie charts. or a click through to a tracker for each item. when the numbers change, i feel blinded to the past.