I'm trying to come up with a breakdown of the size of unions in Iowa, along with their endorsement history.  Here is what I have so far, but it might not be 100% accurate.  Unions report their size using different metrics to fluff up their apparent importance.  I've divided their reports into four categories – Membership, Employees Represented, Active and Retired Employees, and Families.  Because of the Right to Work (for less) law in Iowa, the membership is always going to be the smallest of these numbers, and probably the most important.  (Active and retired members would be helpful too, but no one reports that.)

Of course, it is not all that unlikely that some of the membership numbers are misrepresented, as well.  Still, this is a pretty good rough approximation of the most important labor unions in Iowa, at least for the top 5 or so, their sizes, and their track records.

If you can help me fill in the blanks, please email me at simonrstevenson@gmail.com.

(Inspired by this post from Open Left on the national breakdown.) 

Union	IFL?	Members	Employees	w/ Retired	2000	2004 &nbsp	2006	2008
ISEA	No		32000
AFSCME	Yes	13000	20000		Gore	Dean	Blouin
UAW	No			30000	Gore	Gephardt	Culver
USWA	Yes	7000			Gore	Gephardt	Blouin	Edwards
SEIU		2000	5000		Gore	Dean	Blouin	Edwards
IUPAT	Yes	3000			Gore	Dean
IAMAW	Yes			10000		Gephardt	Culver	Clinton
CWA	Yes	2500					Blouin
IAFF		1570				Kerry		Dodd
UTU			1000	3000		None	Culver	Clinton
Teamsters						Gephardt	Blouin
IBEW	Yes						Blouin
BCTGM	Yes					Gephardt
AFT	Yes							Clinton
APWU	Yes
UA	Yes
GMP	Yes
NALC	Yes							Clinton