It used to be that a Hawaii seat in the U.S. Congress didn’t come open all that often. It’s prestigious, it pays handsomely, there are no term limits and it’s nearly impossible to lose reelection. Also, franking privileges! But over the last two decades Hawaii has elected nine House members including two who served, left office and then went back to D.C. again: Ed Case and Colleen Hanabusa. The expectation that U.S. Rep. Kai Kahele is poised to leave Washington after just one term in an effort to move into the governor’s quarters at Washington Place has at least three...