WSJ: 75% of US internet traffic intercepted by NSA, both Foreign and Domestic, and obtains "content of the communications themselves"

The president claims that there have currently been no abuses.  For the sake of argument, let's take his word for that, but with all this information on people why would believe that it won't be abused in the future?  From the WSJ:

. . . The system has the capacity to reach roughly 75% of all U.S. Internet traffic in the hunt for foreign intelligence, including a wide array of communications by foreigners and Americans. In some cases, it retains the written content of emails sent between citizens within the U.S. and also filters domestic phone calls made with Internet technology, these people say. . . . 

The NSA is focused on collecting foreign intelligence, but the streams of data it monitors include both foreign and domestic communications. Inevitably, officials say, some U.S. Internet communications are scanned and intercepted, including both "metadata" about communications, such as the "to" and "from" lines in an email, and the contents of the communications themselves. 

Much, but not all, of the data is discarded, meaning some communications between Americans are stored in the NSA's databases, officials say. Some lawmakers and civil libertarians say that, given the volumes of data NSA is examining, privacy protections are insufficient. . . .

The one positive benefit from all this is that it is turning young people against Obama.  From The Hill newspaper:

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. . . .