Thursday night in Detroit, standing above the concrete floor of Joe Louis Arena, Sen. Barack Obama ensured that the Michigan delegation will be fully seated at the Democratic National Convention in Denver this August. While this was the first time he declared this formally, you shouldn’t be surprised. In my extensive interview with Michigan superdelegate and Democratic National Committee member Debbie Dingell, she revealed that Obama had, in fact, promised just such an action before she agreed officially to lend him her support.