<i>Well, yes - many of the people pushing this argument around the country really like labor unions.</i><p>That's just a variation of the "liberal media" argument I already pre-empted.<p><i>Interestingly, neither do most corporations.</i><p>Yes they do.  At least, the Fortune 100 does.<p>Corporations and <i>their</i> unions (trade organizations) spend exactly what they need to in order to effectively promote their political interests.  If unions had more money to spend, you'd start seeing billion dollar corporate campaigns.