House GOP fears retirement wave will lead to tsunami

House Republicans plotting to win back their majority in Congress fear they are on the brink of a massive wave of retirements that could force them to play defense in a high-stakes presidential election year.

Three House Republicans said last week they would not seek another term next year, catching party strategists off guard. Those announcements came earlier than in a typical election cycle, when members who are ready to hang up their voting cards usually wait until after the August recess or after the Christmas break.

Republicans in Congress...