This report from Fox News uncovers a network of fake grass-roots organizations, funded by unions, designed to take down the Tea Party movement.

[The Democratic strategists running the sham operation] keep a central mailing address in Washington, pulling in soft money contributions from unions and other well-padded sources to engage in what amounts to a legal laundering system. The money — tens of millions of dollars — gets circulated around to different states by the 527s, which pay for TV ads, Internet campaigns and lobbyist salaries, all while keeping the hands of the unions clean — for the most part.

The system helps hide the true sources of funding, giving the appearance of locally bred opposition in states from Oklahoma to New Jersey, or in the case of the Tea Party Web site, in Illinois.

And this whitewash is entirely legal, say election law experts, who told FoxNews.com that this arrangement more or less the norm in Washington.

“It’s not illegal but it is, I think, dishonest on the part of the organizations,” said Paul Ryan, a legal counsel at the Campaign Legal Center. “And there’s a reason they do it: they know voters don’t like outsiders coming in to sway the vote.”

The battle is joined. Read the whole thing.