Controversy over the National Security Agency’s surveillance programs is eroding President Obama’s popularity — particularly among young voters.

Some polls show a double-digit drop in Obama’s approval rating since Edward Snowden revealed NSA secrets, weakening the president ahead of fall fights with congressional Republicans over the budget and immigration.

Polling taken by the Economist and YouGov finds a 14-point swing in Obama’s approval and disapproval rating among voters aged 18-29 in surveys taken immediately before the NSA revelations and last week. Overall, the swing in Obama’s approval rating moves just four points.

A USA Today/Pew Research poll released in June found that young voters were significantly more likely to support Snowden’s decision to leak classified material. While 60 percent of 18- to 29- year olds said exposing the surveillance programs served the public good, just 36 percent of those over 65 said the same.

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