At-will employment is a legal presumption in all U.S. states (other than Montana), whereby either an employer or an employee may, with no adverse legal consequences, terminate the employment relationship for any legal or no reason. The at-will doctrine is not itself a form or component of contract, but rather is the default state deemed to exist prior to any contractual override. However, the presumption can be overridden by an employment contract, either explicit or, in several states, implicit. For examples, in workplaces with a trade union recognized for purposes of collective bargaining, and...