President Donald Trump’s move Thursday to sign an executive order easing federal restrictions on marijuana — and clearing the way for a Medicare pilot program covering CBD — caps a coordinated, yearlong push by the cannabis industry that combined traditional lobbying, sizable political donations, data-driven messaging and direct outreach to the president’s inner circle, industry insiders told CNBC.

Despite long-standing GOP opposition to loosening drug laws — including a small wave of bills from lawmakers seeking to tighten rules after the executive order — industry advocates have claimed a victory. They see the order as a success in reframing marijuana not as a social issue, but as a pro-business policy, ultimately winning over a president famous for his sobriety.

“I’ve never been inundated by so many people as I have about” reclassifying marijuana, Trump said during a signing ceremony in the Oval Office on Thursday.

Three figures emerged as the primary architects of this policy shift, according to multiple insiders, including one CEO of a cannabis company listed on the New York Stock Exchange, who requested anonymity to speak candidly. The key players were Howard Kessler, a Palm Beach billionaire and longtime friend of the president; Kim Rivers, the CEO of cannabis giant Trulieve; and Tony Fabrizio, Trump’s longtime pollster, the people said.