LANSING, Mich. — Michigan Republicans approved a plan Saturday to award the majority of the state's delegates in the race for the GOP presidential nomination based on the results of 13 district-level caucus meetings. The decision, which breaks with recent tradition, came during a closed-door meeting of Michigan's Republican state committee in Grand Rapids, according to three sources with knowledge of the event but who weren't authorized to speak on the development. It wasn't immediately clear what the vote tallies were on the resolution. The plan still needs to be officially submitted to the R...