Idaho Code § 44-2006
It shall be unlawful for any person, labor organization, or officer, agent or member thereof, or employer, or officer or agent thereof, by any threatened or actual intimidation of an employee or prospective employee or his parents, spouse, children, grandchildren, or any other persons residing in the employee's or prospective employee's home, or by any damage or threatened damage to his property, to compel or attempt to compel such employee to join, affiliate with, or financially support a labor organization or to refrain from doing so, or to otherwise forfeit his rights as guaranteed by provisions of this chapter. It shall also be unlawful to cause or attempt to cause such employee to be denied employment or discharged from employment because of support or nonsupport of a labor organization by inducing or attempting to induce any other person to refuse to work with such employee.
Idaho Code § 44-2006