You mean like felons? foreigners?
You will note the generous chap who offered to match $250 in donations - anything more than that would require full disclosure on the donor.
His opponent has a great deal to question here. 
I think the big guy should be a little, uh, cautious about giving his fund-raising totals.
As we already know, some of those dollars are real, already passed on to him, and others are just "promised" or "pledged."
Say my fellow Nebraskan says he has a hundred bucks.
We know he's got fifty in the bank, and fifty in primitive promises.
But he insists he has a hundred bucks.
Nebraska law requires that campaign financing report actual dollars gotten. One doesn't report promised dollars, dollars one hasn't actually gotten yet.
So Omaha's Ed Norton blabs to the world that he has a hundred bucks.
But on his campaign financing report, he puts down the fifty actually gotten, as required by law.
But he said he got a hundred bucks.....And so that's a second thing to watch here; to ensure that Chief Big Bucks reports to the state of Nebraska the same amounts he reports to the primitives. If he tells the primitives he's got a hundred bucks, he better tell the bureaucrats in Lincoln he's got a hundred bucks, too.
He's not going to listen to franksolich, but if I were the big guy, I'd report to the primitives
only the amounts he actually got, rather than including the
promised pledges.