If you didn't hear about this, it's because virtually the entire mainstream media has been silent about it. The mainstream media is owned by just six corporations and relies for the bulk of its funding on pharmaceutical advertisers.
In a report from High Times, President Trump is referenced as stating that he is "a hundred percent" in favor of medical marijuana and added that legalizing it is "good in some ways."
The comment was made during an interview conducted by Bill O'Reilly while Trump was still a candidate, and indicated to many people that he had an open mind on the matter.
"I do want to see what the medical effects are," he said.
After repeating this twice, Trump then volunteered his complete support for medical marijuana, continuing with his pro medical marijuana comments—in spite of O'Reilly's claim that "medical marijuana is a ruse."
Faced with Trump's support for medical marijuana and his personal familiarity with medical cannabis patients, O'Reilly conceded that "I know, and they're taken care of."
Aside from his support for medical marijuana, the most interesting comment that Trump made about his position was that "in some ways, I think [legalization] s good."
But it appears that Trump may have been holding back his real beliefs, in the interests of gaining votes from older generation conservatives.
Trump said in the 1990s, as a private citizen, that marijuana should be legalized in order to end the war on drugs. If he actually does this now that he's the President, he would end the private prison industrial complex, reform America's police problems, and end the violent drug cartels.