Americans for Prosperity (AFP), the flagship political arm of the rightwing network formed by the fossil fuels billionaire Charles Koch and his late brother David, is launching a multimillion-dollar campaign backing Donald Trump’s plans to extend tax cuts and roll back federal regulations. The donor appeal calls for even bolder tax cuts for corporations that would directly benefit Koch Industries, the energy and chemicals giant from which most of AFP’s funding derives. “Trump and Koch are working hand in glove transactionally to move the parts of the Trump agenda that the Koch network agrees with – and that’s a lot of it,” said Nancy MacLean, professor of history and public policy at Duke university.