What I found, true, Biden did pardon nonviolent drug offenders.
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President Joe Biden used clemency powers to pardon or commute the sentences of thousands of people with drug-related convictions: he issued a categorical pardon for federal simple marijuana possession on federal lands and in D.C., he announced pardons and commutations in multiple rounds (including 11 pardons + 5 commutations in April 2024), and in his final days he commuted the sentences of nearly 2,500 people convicted of nonviolent drug offenses
[1] [2] [3] [4]. Available sources do not give a single count labeled “drug dealers pardoned,” but they document broad clemency for people convicted of nonviolent drug offenses and marijuana possession
[3] [1] [2].