For years, Missouri Republicans worked to undo or restrict voter-approved laws and amendments. In passing Amendment 6, voters have not only protected the ballot initiative process but also dramatically strengthened their power over the legislature.

Across the country on Tuesday, voters delivered a wave of Democratic victories, flipping seats in Congress as well as state legislatures, and weakening a number of Republican majorities.

Missouri was no exception. Democrats made significant gains in the state House, picking up 16 seats, though Republicans still hold every statewide office and maintain control of the legislature.

Nonetheless, the election was more than just a rebuke of Donald Trump. It reflected a long-simmering frustration with Missouri politicians who, time and again, have sought to override the will of voters — a practice that has intensified under years of Republican control. What’s more, voters went beyond weakening the Republican majority. They approved a constitutional amendment that curtailed the powers of the legislature and shifted more authority directly to the people.

Amendment 6, approved by a decisive margin, sharply limits the legislature’s ability to overturn laws and constitutional amendments enacted through citizen initiatives, and its ability to revive laws voters rejected through referendums.