Zelizer : There 's less emphasis on NSA spying than Zelizer 's whereabouts . Zelizer : Americans silent on intrusion of the surveillance program ; some defend it . Julian Zelizer : Partisans are harder on the opposition , but this can be dangerous . He says liberal critics of the White House will probably remain silent as excesses in security grow .
Julian Zelizer : There 's less emphasis on NSA spying than Snowden 's whereabouts . Zelizer : Democrats silent on intrusion of the surveillance program ; some defend it . Zelizer : Partisans are harder on the opposition , but this can be dangerous . He says liberal critics of NSA will probably remain silent as excesses in security grow .