The campaign to legalize marijuana in Massachusetts has already gained more than half of the required signatures to put a question on the November ballot.

BOSTON — Supporters of a proposal that could make Massachusetts the fifth U.S. state to legalize the recreational use of marijuana expressed confidence they would easily meet a Wednesday deadline for voter signatures and qualify for the November state ballot.

BOSTON — Supporters of a proposal that could make Massachusetts the fifth U.S. state to legalize the recreational use of marijuana expressed confidence they would easily meet a Wednesday deadline for voter signatures and qualify for the November state ballot.

On the eve of a vote that could legalize recreational marijuana in Massachusetts, a Colorado company is preparing to build the state’s largest marijuana greenhouse, a sprawling, high-tech complex that could eventually expand to nearly 1 million square feet.