In N.L.R.B. v. McGahey, 233 F.2d 406 (5th Cir. 1956), this court described casual and moderate inquiries, even as to union preference, absent evidence indicating that the employee has reason to consider the inquiries a threat of reprisals, as not constituting an unfair labor practice in violation of ยง 8(a)(1).
In Bourne, we held that interrogation which does not contain express threats is not an unfair labor practice unless certain "fairly severe standards" are met showing that the very fact of interrogation was coercive.