“We haven’t put a penny in any of these campaigns, pro or con,” Koch said. “That’s not what we do. What we’re trying to do is build alliances to make the country better.”

Koch, author of the book “Good Profit,” said he would only consider contributing to either Trump or Cruz if they backtrack on some of their most controversial promises. That includes one of Cruz’s favorite lines of his campaign stump speech — to carpet bomb ISIS in the Middle East and “make the sand glow.”

“That’s gotta be hyperbole, but I mean that a candidate — whether they believe it or not — would think that appeals to the American people,” Koch said. “This is frightening.”

Koch also slammed Trump’s rhetoric towards Muslims, saying his proposal of a temporary travel ban was “antithetical.”

“What was worse was this ‘we’ll have them all registered,'” Koch said. “That’s reminiscent of Nazi Germany. I mean — that’s monstrous as I said at the time.”