The Employee Rights Act of 2018 This bill requires the selection of labor representatives for collective bargaining through secret ballot in an election conducted by the National Labor Relations Board. It also provides for recertification of a bargaining unit if an employer asserts that turnover, expansion, or alteration by merger exceeds 50% of the unit. The bill also prohibits dues paid by an employee to a labor organization from being expended for any purpose not directly related to the organization's collective bargaining or contract administration functions unless the employee authorizes such expenditure in writing.