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.alternet.org/rights/145447/why_the_aclu_supported_the_supreme_court%27s_shocking_assault_on_free_speech

http://www.opensecrets.org/news/2011/09/labor-lobbying-union-pac-money.html