on may 27, the illinois house approved constitutional amendment 1 in a 73-44 vote, two votes more than the 71 votes needed to pass, in what the "chicago tribune" called a "historic vote". the constitutional amendment proposal will be sent to voters for a 2020 referendum after it passed both houses of the legislature with 3/5 approval. the house passed senate bill 687 three days later. illinois governor j. b. pritzker signed senate bill 687 on june 5, 2019.