NASHVILLE, Tenn. (AP) — Lawmakers this year have kicked rival colleagues out of office in Tennessee and off the chamber floor in Montana. They have staged walkouts in Oregon and filibusters in Nebraska, where interactions are so fraught that some lawmakers say they’re unsure they can work together anymore. In a year of outsized acrimony at statehouses, it would be wrong to say tensions have never been worse. Legislatures have seen fistfights, unpopular members hounded from office, mass expulsions and even armed confrontations. Experts say what’s different now is that politics can reward sparring and punish bipartisanship, making reelection tougher...