On May 12, the Missouri legislature passed HJR 53 and HB 1631. If these bills become law, then in November 2016 the voters will be asked if they wish to amend the Missouri Constitution to allow the legislature to require certain kinds of government photo-ID for voters at the polls.

It is somewhat likely that these bills will be vetoed by Governor Jay Nixon, who is a Democrat. But it is also likely that the legislature will then override the veto. See this story. Thanks to Ken Bush for the link.