The Congress, therefore, further finds and declares that the enactment of this chapter is necessary to eliminate or prevent improper practices on the part of labor organizations, employers, labor relations consultants, and their officers and representatives which distort and defeat the policies of the Labor Management Relations Act, 1947, as amended [
29 U.S.C.
141 et seq.], and the Railway Labor Act, as amended [
45 U.S.C.
151 et seq.], and have the tendency or necessary effect of burdening or obstructing commerce by