American Crossroads also has a non-profit arm that is not legally required to disclose its fundraising to the FEC.

The Syngenta Foundation, the non-profit arm of the Swiss seeds and pesticides company, has also joined the quest for increased teff production.

Siyavula Education's non-profit arm provides learners with an infinite amount of science and maths exercises at a level that specifically shaped around their ability.

American Bridge, a group that does research on rival Republicans, raised $2.6 million together with its non-profit arm.

The Republican PAC supported by Karl Rove, former top adviser to president George W. Bush, raised $51 million together with its non-profit arm, Crossroads GPS.