How partisan are WA organizational donors?

In previous posts we’ve looked at how our political system has become increasingly polarized, with our analysis of voting records showing that many self-styled moderates and independents are exhibiting much more partisan behavior when voting on the House or Senate floor.  Having served for a few years now on a PDC open data advisory group, I realized that the same type of analysis could be done for organizational donors.  Despite this being public data, not many people in Washington state know who the biggest political donors are, much less who they support.

So, are many of these “non-partisan” or “bi-partisan” organizational donors more partisan than they let on?

We can figure this out, and the methodology is pretty simple.  The PDC Open Data Portal publishes all contributions to candidates and political committees back to 2008.  For this first analysis, we looked at donations to partisan legislative and statewide candidates from businesses, unions and political action committees.  The partisanship score for each donor is the difference in percentage of donations by party, giving each a range from 100 (exclusively Republican) to -100 (exclusively Democrat).

Most of the effort here is involved with the fuzzy matching algorithm, since candidates are very inconsistent on how they report the names of these organizations to the PDC.  I use a trigram matching method, which isn’t perfect…but it does pretty well.  Currently, contributions are grouped under the same donor if 80% or more of the trigrams match, but this is adjustable.

Here are the results:

Partisan Donors (2008-18)

If you visit WhipStat.com, you’ll now find an interactive and animated version of our organizational donor partisan analysis that allows you to filter by jurisdiction type and date range.

Filters

If you’d like to do further analysis, feel free to hit the Download button for a tab-delimited table of the charted data.  Note that for now we don’t display or download the complete donor dataset, as that includes over 8,000 organizations.

A few things become apparent when reviewing the results:

  • Some of the biggest legislative donors give heavily to candidates from both parties.
  • About 6% more is given to Democrats than Republicans in legislative races, but that increases to 28% when looking at statewide races.

Up next:  We’ll take a close look at hard money vs. soft money contributions.

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