. . . IMO, if you can't find a crime and find a way to present it so that regular folks (AKA, "jurors") can understand it in much, much less than six years, maybe you have no business going after the target.
Well, in DeLay's case, the whole purpose was to "taint" him politically.
Period.
It was the Federal version of "You may beat the rap, but you won't beat the ride."
As for ". . . find a crime and find a way to present it so that regular folks (AKA, "jurors") can understand it . . . " I recall that some years ago (~20?) I read about some sort of securities trial that was so complex, the jurors acquitted because they couldn't make heads nor tails out of the government's case; when they asked the judge for clarification, all he did is give them the actual text of the law, which was about as clear as Urdu.
After being criticized by the prosecutor, the jurors took the unusual step of issuing a public statement that they weren't stupid, but the more the judge and government lawyers talked, the less they made sense. And if they couldn't figure out what was allegedly done - much less if it was even illegal under the law as written -
after the fact, there was no way they could in good conscience convict someone for not being able to figure out what the law said beforehand.