What is the current state of the law on "imputed political opinion"?

Rodriguez argues that he faces persecution in Peru on the basis of his political opinion for refusing to go on strike at the shoe factory where he worked. Where a petitioner has not overtly expressed his political opinion, we have held that "certain conscious and deliberate acts or decisions by an alien may establish a well-founded fear of persecution on account of imputed political opinion, but only when a persecutor attributes political beliefs to an alien as a result of these acts or decisions." Estrada-Posadas v. INS, 924 F.2d 916, 919 (9th Cir.1991).