$63.5 million: The minimum amount spent by both sides in the recall
70 percent: How much more expensive the governor’s recall election is than the state’s second-most expensive race (the 2010 gubernatorial campaign)
$30.5 million: Amount raised by Walker to fight off the recall effort
$3.9 million: Amount raised by his challenger, Tom Barrett, the Democratic mayor of Milwaukee
About 2/3: Proportion of Walker’s donations that have come from donors outside Wisconsin
About 1/4: Proportion of Barrett’s donations that have come from donors outside Wisconsin
Unlimited: Maximum individual donation Walker may accept under state law
$10,000: Maximum individual donation Barrett may accept under state law
$16.3 million: Amount spent by pro-Walker independent expenditure groups, which have invested $22 million in the Wisconsin recall
Some of the biggest contributions and expenditures in support of Walker:
• $510,000 to Walker from Diane Hendricks, Wisconsin’s richest businesswoman and a member of Charles and David Koch’s million-dollar donor club
• $490,000 to Walker from Bob Perry, a Houston homebuilder who with his wife has spent more than $8 million on the 2012 elections
• $260,000 to Walker from David Humphreys, a member of the Kochs’ million-dollar donor club
• $250,000 to Walker from former Amway CEO Dick DeVos of Michigan, a member of the Kochs’ million-dollar donor club
• $250,000 to Walker from Las Vegas casino magnate Sheldon Adelson, who with his wife has spent more than $25 million on the 2012 elections
• $100,000 to Walker from Wyoming investor Foster Friess, a member of the Kochs’ million-dollar donor club
• $100,000 to Walker from New York billionaire Louis Bacon, a media-shy hedge-fund trader
• $100,000 to Walker from Dallas oil and gas billionaire Trevor Rees-Jones
• $6.5 million on ads spent by Americans for Prosperity, Wisconsin Manufacturers and Commerce, and the anti-labor Center for Union Facts
• $4 million on ads spent by the Republican Governors Association‘s Right Direction Wisconsin PAC; only about $7,000 was raised in-state. The RGA got $1 million from David Koch in February. It’s also received $500,000 from the US Chamber of Commerce