As early in-person voting began on Saturday in Michigan, a fight for control of the GOP in the crucial battleground state plunged Republicans there deeper into a political maelstrom, with rival factions potentially barreling toward hosting dueling nominating conventions. As if things weren’t already confusing. In a little over a week, the state will host a traditional primary on one day, and then a caucus-style convention a few days later. Now, it seems, there could actually be two conventions,