Aaron Smith, executive director of the National Cannabis Industry Association, a trade group, said Congress needed to help an industry that was growing quickly and was expected to have a market value of nearly $22 billion by 2020.

After Tuesday’s votes, he noted that more than 60 percent of Americans will now live in states that have approved either medical or recreational marijuana, or both.

“Last night’s results send a simple message: The tipping point has come,” Smith said.

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