The amendment won by 375,000 votes. Under the August proposal, its 31,500-vote loss in one district would have killed it.

Missouri voters approved a constitutional amendment in 2016 barring state and local governments from imposing new sales taxes on most services — a measure its backers pitched as protection against future taxes on haircuts, car repairs, childcare and other everyday expenses. It passed with nearly 57% of the vote. Under a proposal on the Aug. […]