“There’s no way to keep the money,” said Doris Chandler Duke, ...a major Clinton supporter...
In other words, “We looked at every possible argument for keeping the money, but could not come up with one that would work.”
That is exactly what I was thinking. They don't care if the money is dirty, just if keeping it would hurt their image. Anyway, they'll probably give it back as collateral on a guaranteed interest-free loan.