Union vs Business Campaign Spending
http://www.opensecrets.org/bigpicture/blio.php
All Contributions (2009-2010)
Grand Total Democrats Republicans Dem % Repub % Business$1,367,082,973 $661,573,901 $631,129,597 51% 49% Labor $96,639,270 $65,372,056 $4,490,442 94% 6% Ideological $138,984,158 $61,947,561 $54,119,642 53% 47% Other $215,179,297 $108,240,161 $98,615,460 52% 48% Contributions from Individuals (2009-2010) Grand Total Democrats Republicans Dem % Repub % Business $975,679,204 $493,535,035 $462,697,246 52% 48% Labor $9,924,653 $456,451 $33,520 93% 7% Ideological $55,867,800 $27,504,792 $20,459,686 57% 43% Other $208,829,760 $106,980,520 $97,921,360 52% 48%
http://www.opensecrets.org/bigpicture/blio.php
http://www.reuters.com/article/2011/07/07/us-usa-campaign-unions-idUSTRE76674H20110707
Union contributions topped $64 million during 2010, with 93 percent going to Democrats, according to the Center for Responsive Politics.
http://online.wsj.com/article/SB10001424052702303339504575566481761790288.html
This doesn't seem complete, though. It's just showing "single contributors", not the totals.
outside spending: http://www.opensecrets.org/outsidespending/index.php
Total by Type of Spender, 2012 (so far) Type of Group Total Spent # of Groups Registered # of Groups Spending to date Super PACs: $117,768,385 582 92 Parties: $5,178,398 27 15 Others (Corporations, unions, individual people, other groups, etc): $21,265,840 184 160 Grand Total: $144,212,623 793 267
http://www.opensecrets.org/news/2011/09/labor-lobbying-union-pac-money.html