Alaska will try something completely new in the fall election

Alaska’s Supreme Court ruled this week that a new election system can go forward, clearing the way for ranked-choice voting to get its highest-profile test yet in a contested U.S. Senate race there.

Later this year, Sen. Lisa Murkowski, a Republican, is likely to face a challenge from a former state official, Kelly Tshibaka, who has been endorsed by former President Donald Trump. Although elections in Alaska rarely make headlines outside the state, this race is likely to be an exception and will be watched closely as a test of...