Trump's newest enemy: The Club for Growth

Club for Growth spokesman Doug Sachtleben in response blasted what he called a “childish attack.” 

“Donald Trump’s childish attack on the Club for Growth shows what a joke his candidacy is,” Sachtleben told Business Insider in an email.

“Trump asked for a meeting with the Club, and expressed interest in donating to our organization, so of course we responded. But obviously he had something else in mind, most likely getting the Club to stop pointing out his liberal positions on national health care, massive tax increases, and trade protectionism, which we did when he started his silly political roadshow back in 2011.  If Donald Trump wants to pretend to be a candidate for president, then he should get some thicker skin,” Sachtleben said.