JEFFERSON CITY, Mo. — The public has spoken: Missouri River Runner is the new name for the state-supported Amtrak trains between St. Louis and Kansas City. The name evokes the river that parallels much of the route, plus the Mississippi River at the eastern terminus and the Kansas River at the western end, Amtrak said. It was submitted by Keith Kohler of Glendale, Mo., and it received 2,036 votes, or 37 percent of the votes cast. More than 8,300 name submissions were entered late last year. After contest judges narrowed those submissions to just five finalist names, 5,455 votes came