JEFFERSON CITY, Mo. (AP) — A proposal for a high-voltage power line carrying wind energy across the Midwest received a jolt of new life Tuesday as the Missouri Supreme Court ruled that state regulators had wrongly rejected it.

The ruling is a major victory in the quest by Clean Line Energy Partners to build one of the nation's longest electric transmission lines. The $2.3 billion project would carry power harnessed from the wind-whipped plains of western Kansas on a 780-mile (1,255 kilometer) trek across Missouri and Illinois before hooking into an electric grid in Indiana that serves the east...