That’s what Tom DeLay was indicted for, his conspiring to launder corporate money to Republican candidates (via The Carpetbagger Report) :

In 2001, Tom DeLay helped to set up an organization called TRMPAC (Texans for a Republican Majority Political Action Committee) aimed at helping the Texas GOP gain control of the state Legislature. His goal was to force a redistricting of Texas’ congressional districts that would increase the Republican majority in Washington.

DeLay succeeded in sending five more Republicans to Congress. But his tactics created two problems. First, Texas has very strict laws forbidding the use of money raised from corporations in state races, and TRMPAC raised a lot of corporate money. Second, it made for one very shady deal. On Sept. 20, 2002, the director of TRMPAC sent $190,000, including money raised by corporations, to the Republican National State Elections Committee. Exactly two weeks later, that committee sent exactly $190,000 to state candidates favored by TRMPAC. Each transaction, taken alone, appears legal. Bundled together, they look like an effort to funnel corporate money into a race from which it was banned.

DeLay’s defense is that he didn’t know the details of what was happening in the organization, that the matching numbers of the $190,000 transfers were just a coincidence, and that the money raised from corporations was spent on administrative office expenses, which is legal in Texas legislative races. But all of those arguments have major weak spots that the experienced prosecutor on the case, Ronnie Earle, could expose.

As the geniuses at Blogs For Bush summed up his defense “Tom Delay didn’t know about the perfectly legal transaction he is accused of conspiring to make”. Maybe you should ask DeLay again.