on april 11, president donald trump told senator cory gardner of colorado that he would "support congressional efforts to protect states that have legalized marijuana". a bill to resolve the state-federal conflict was still "a work in progress" but seemed to a colorado cannabis industry group be implicit in gardner's comments afterwards. california senator dianne feinstein made a surprising reversal of her prior stance against state or federal legalization in may and said she was "open to supporting" the gardner bill. gardner and senator elizabeth warren introduced the states act in june to apply federal prohibition only in states that did not have state-level legalization.