The Wall Street Journal has a great editorial up on the National Right to Work Foundation's ongoing efforts to push the Departments of Labor and Justice to investigate the SEIU for illegal campaign fundraising. Money quote (emphasis mine):

The mighty Service Employees International Union (SEIU) plans to spend some $150 million in this year's election, most of it to get Barack Obama and other Democrats elected. Where'd they get that much money?

That's a question the Departments of Labor and Justice are being asked to investigate by the National Right to Work Legal Defense Foundation. Specifically, the labor watchdog group wants Justice to query a new SEIU policy that appears to coerce local workers into funding the parent union's national political priorities.

The union adopted a new amendment to its constitution at last month's SEIU convention, requiring that every local contribute an amount equal to $6 per member per year to the union's national political action committee. This is in addition to regular union dues. Unions that fail to meet the requirement must contribute an amount in "local union funds" equal to the "deficiency," plus a 50% penalty. According to an SEIU union representative, this has always been policy, but has now simply been formalized.

No other major institution could get away with its bosses demanding that every single one of its workers step in line behind its political preferences. This is the sort of imposed political obeisance that infuriates so many workers and turns them away from
unions.

Ed Morrissey at Hot Air follows up with commentary on some of the broader implications of SEIU political activism (emphasis mine):

Now the SEIU suddenly has $150 million, from which they’ve already committed at least $85 million specific to Democratic candidates. That money got squeezed out of the locals under duress, in obvious violation of the spirit and letter of federal law. The union knows how to protect itself and its interests, and the lockstep nature of their support for Democrats should awaken voters to the threat their policies comprise. This is nothing more than a closed-feedback loop for Democrats, and Card Check is the prize that will ensure its rapid growth. The Department of Justice needs to put an end to this shakedown racket immediately.