In a case involving alleged refusals to hire based on anti-union animus under Section 8(a)(3), may the Board rely solely on "generalized" animus, when such evidence is not causally connected to the specific hiring decisions at issue?

Whether the NLRB may rely solely on 'generalized' evidence of anti-union animus, without a causal nexus to the specific adverse employment actions at issue, to establish a violation of Section 8(a)(3) of the National Labor Relations Act