LA Times Poll: Trump 45.3% Clinton 41.9%...

[jimnyc]

Yes, he is still getting spanked nationally, as per the aggregate polling from realclear, which takes ALL polls into account. He's down 5.3 head to head there, and down 4.4 when all 4 candidates are taken into account. But I also like this one. Of course because it has him in the lead :p , and also because it's daily polling from the Los Angeles Times, which I can't imagine is in the middle of rightie central.

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Just a graph on their page daily - http://www.latimes.com/politics/

And apparently some explanation as to why their polling is different, but I've used up my monthly allotment of viewing and now they want me to $$ subscribe to read more. Yeah, like that'll ever happen!!

[Kathianne]

Yes, he is still getting spanked nationally, as per the aggregate polling from realclear, which takes ALL polls into account. He's down 5.3 head to head there, and down 4.4 when all 4 candidates are taken into account. But I also like this one. Of course because it has him in the lead :p , and also because it's daily polling from the Los Angeles Times, which I can't imagine is in the middle of rightie central.

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Just a graph on their page daily - http://www.latimes.com/politics/

And apparently some explanation as to why their polling is different, but I've used up my monthly allotment of viewing and now they want me to $$ subscribe to read more. Yeah, like that'll ever happen!!

I posted this awhile ago, I think. It's not intentionally favoring Trump, but the methodology is different than the others. It may be right, but tends to be an outlier for him:

http://www.latimes.com/politics/la-na-pol-polling-differences-20160809-snap-story.html


Why the USC/L.A. Times tracking poll differs from other surveys
David Lauter
Since July 28, when Hillary Clinton accepted the Democratic nomination, she has gained five points in the USC Dornsife/LA Times Daybreak tracking poll (http://www.latimes.com/politics/) of the election. That’s similar to Clinton’s gain in other measures of the race, including the 538.com polling forecast (http://projects.fivethirtyeight.com/2016-election-forecast/national-polls/) (4.5-point gain) and the Real Clear Politics average (http://www.realclearpolitics.com/epolls/2016/president/us/general_election_trump_vs_clinton-5491.html) (2.9-point gain).

But although the trend lines are similar, the Daybreak tracking poll shows a smaller lead for Clinton. As of today, the tracking poll shows Clinton leading by two percentage points, 45% to 43%, compared with a nine-point lead in the Huffington Post polling average (http://elections.huffingtonpost.com/pollster/2016-general-election-trump-vs-clinton) (48% to 39%), an eight-point lead in the Real Clear Politics average (48% to 40%) and a seven-point lead in 538.com’s model of national polls (45% to 38%).

...

Either way, the current gap between the tracking poll and the other measures of the election likely will shrink over the next couple of weeks.


That probably won’t close the whole gap, though. A couple of other aspects of the Daybreak poll make it differ from most other surveys:


Typically, polls ask people which candidate they favor or lean toward. Those who say they don’t know or are undecided don’t get factored into calculations of candidate support.


The Daybreak poll, by contrast, asks voters, using a 0-to-100 scale, to rate their chances of voting for Clinton, for Trump or for some other candidate. As a result, everyone who responds to the survey has some impact on the results. Because that approach gathers information from everyone in the poll sample, it should give a better read on the many voters who remain ambivalent about their choices.


Using the 0-to-100 scale, however, almost certainly makes the Daybreak poll differ somewhat from other surveys. As with the bounce, any difference that results should shrink as election day gets closer and voters become more certain of their choices.


Finally, some analysts think (http://www.nytimes.com/2016/08/09/upshot/a-favorable-poll-for-donald-trump-has-a-major-problem.html?rref=collection%2Fsectioncollection%2 Fupshot&action=click&contentCollection=upshot&region=rank&module=package&version=highlights&contentPlacement=4&pgtype=sectionfront) the Daybreak poll is slightly tilted toward the Republican side because of how it accounts for the way people voted in the last election.


All pollsters weight their results somewhat to make sure their samples match known demographics — the right proportions of men and women, for example, or blacks, whites and Latinos.


The Daybreak poll goes a step further and weights the sample to account for how people say they voted in 2012: It’s set so that 25% of the sample are voters who say they cast a ballot for Mitt Romney and 27% for President Obama. The rest are either too young to have voted four years ago or say they didn’t vote.


The potential problem is that people tend to fib about how they voted. Polls have often found that the percentage of people who say after an election that they voted for the winner exceeds the winner’s actual vote.


If that’s the case this year, then weighting for the vote history would result in slightly too many Republican voters in the sample, which would probably boost Trump’s standing by a point or two.


Unfortunately, there’s no way to know for sure until we can compare the final vote to the poll’s final forecast. Given how long it takes to count all the votes, that answer won’t be available until at least a week after election day.
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[jimnyc]

And the same for many of the polls about Clinton, if not some perhaps done intentionally. That's why in the long run, I still think the aggregate is the best way to go - but even then we are running on an aggregate of who knows what for sure. It used to be that Gallup and Rasmussen were the top places to go. Now Gallup isn't even in there, and Rasmussen has Clinton ahead by +1.