Pundits have busied themselves in the past week trying to determine whether a decision by Taipei to renegotiate US beef imports with Washington will have implications on US security commitments to Taiwan. Already, an unexpected delay in US President Barack Obama’s weapons sale notification to Congress — which had been expected soon after Obama returned from climate talks in Copenhagen last month — had prompted speculation that Washington may be tying economic matters to political ones and retaliating for the about-face.