The National Labor Relations Board (NLRB) makes sure that both the employers and unions follow the law pertaining to workers right to join or not join a union. They will monitor an election for union...
it determines and implements, through secret ballot elections, the choice by employees as to whether or not they wish to be represented by a union (and if so by which union) in dealing with their...
Its creation in 1935 by Congress was in response to the National Labor Relations Act (the Wagner Act). Later acts, such as the Taft-Hartley Act, have amended the original NLRB.