Sen. Ben Nelson (D-NE) targeted by attack ad group set up by Karl Rove to hide donors from voters

Karl Rove, advocate of more tax breaks
for billionaires

It accuses Nelson and 4 other Democratic senators, in virtually identical ads (See them here), of voting for the "failed" stimulus package — you know, that package that saved the US from another Great Depression because of Bush II's kamikaze economics of lowering taxes on the super rich and increasing spending on a $2,000,000,000,000 war in Iraq based on false claims of weapons of mass destruction.

The group, American Crossroads GPS (Grassroots Policy Strategies), is a sister organization to American Crossroads and is now raising more money than it. American Crossroads GPS It will spend $20,000,000 in the next two months to target Obama's economic policies as Congress decides whether to restore taxation of wealthy Americans to earlier levels.

Bloomberg reports:

Republican strategist Karl Rove helped start the Crossroads groups last year after the Supreme Court ruled, in Citizens United v. Federal Election Commission, that corporations and labor unions can spend unlimited amounts of money advocating the election or defeat of political candidates...

American Crossroads is a political group registered with the FEC and must disclose its donors. Crossroads GPS is organized as a non-profit social welfare organization that can keep its donors’ identities secret as long as it spends less than half its budget on politics.

There are severe financial penalties on 501(c)(4)organizations like American Crossroads GPS who don't follow the rules, and Karl Rove may have been playing fast and lose with those rules.