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“The Poll Manipulator” is here!

It's that time of year -- the time when everyone gets into the business of slicing and dicing public opinion surveys. One unceasing point of dispute each season is questioning the "partisan balance" in election polls -- something that's reached new prominence with the quick popularity of a website purporting to "unskew" polls (and its satirical doppelgänger).

To make this activity more accessible (and accurate), we present the "party id manipulator." If you are fortunate enough to know the "real" gap between Democrats and Republicans in the country -- or just want to play out different scenarios -- use the drop-down menus below to set the partisan gap. Each level of party composition adjusts the results of recent polls, based on their reported party splits and levels of party-line voting.

The tool has been updated to include new polls from NBC-WSJ, NPR and National Journal.

Thanks to HuffPost pollster for a terrific catalog of polls.

(And if you are truly clairvoyant, please offer stock tips in the comments section.)

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Republicans debated Saturday night. The South Carolina GOP primary and the Nevada Democratic caucuses are next on Feb. 20. Get caught up on the race.
The Post's Dan Balz says...
Rarely has the division between Trump and party elites been more apparent. Trump trashed one of the most revered families in Republican politics and made a bet that standing his ground is better than backing down. Drawing boos from the audience, Trump did not flinch. But whether he will be punished or rewarded by voters was the unanswerable question.
GOP candidates react to Justice Scalia's death
Quoted
I don't know how he knows what I said on Univision because he doesn't speak Spanish.
Sen. Marco Rubio, attacking Sen. Ted Cruz in Saturday night's very heated GOP debate in South Carolina. Soon after, Cruz went on a tirade in Spanish.
The Fix asks The State's political reporter where the most important region of the state is.
The State's Andy Shain says he could talk about Charleston, which represents a little bit of everything the state has to offer from evangelicals to libertarians, and where Ted Cruz is raising more money than anywhere else. In a twist, Marco Rubio is drawing strong financial support from more socially conservative Upstate. That said, Donald Trump is bursting all the conventional wisdom in the state. So maybe the better answer to this question is, "Wherever Trump is."
Past South Carolina GOP primary winners
South Carolina polling averages
Donald Trump leads in the first state in the South to vote, where he faces rivals Ted Cruz and Marco Rubio.
South Carolina polling averages
The S.C. Democratic primary is Feb. 27. Clinton has a significant lead in the state, whose primary falls one week after the party's Nevada caucuses.
67% 22%
The complicated upcoming voting schedule
Feb. 20

Democrats caucus in Nevada; Republicans hold a primary in South Carolina.

Feb. 23

Republicans caucus in Nevada.

Feb. 27

Democrats hold a primary in South Carolina.

Upcoming debates
Feb 25: GOP debate

on CNN, in Houston, Texas

March 3: GOP debate

on Fox News, in Detroit, Mich.

March 6: Democratic debate

on CNN, in Flint, Mich.

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