Marathon Pundit: WSJ: Political spending by unions far exceeds direct donations

While unions certainly contribute enormous sums of cash to political candidates--almost all of them Democrats--that is only part of the story, as the Wall Street Journal (subscription required) tells us:

Organized labor spends about four times as much on politics and lobbying as generally thought, according to a Wall Street Journal analysis, a finding that shines a light on an aspect of labor's political activity that has often been overlooked.

Previous estimates have focused on labor unions' filings with federal election officials, which chronicle contributions made directly to federal candidates and union spending in support of candidates for Congress and the White House.

But unions spend far more money on a wider range of political activities, including supporting state and local candidates and deploying what has long been seen as the unions' most potent political weapon: persuading members to vote as unions want them to.

The new figures come from a little-known set of annual reports to the Labor Department in which local unions, their national parents and labor federations have been required to detail their spending on politics and lobbying since 2005.