If the donor wants to continue to live in the home after the 10-year term, the parties can enter into a lease arrangement.

If the donor wants to contribute to that second or third candidate, he can do so directly.

Top donors don't want anything to do with it.

Big donors may want to consult a tax adviser.

Of course, such a strategy may be more than any individual donor wants to shoulder.

That would allow a total of $450,000 a year if a donor wanted to give the maximum to both parties.

So splits have developed in how big donors want their money to be spent.

"Hopefully, these are sectors the donors will want to support."

"The donors all want to have a little bit of distance from us," the official said.