Russia tried to hack the RNC too. The RNC spam filter caught the email.

Russian hackers tried, and failed, to gain access to Republican National Committee computers using the same tactics that allowed them to hack the Democratic National Committee, The Wall Street Journal reports. Unlike with the DNC, though, hackers were unable to get past the RNC's cybersecurity, which seized phishing emails with a spam filter.

The Russian attempts to hack the RNC were less aggressive than those to hack the DNC, sources told the Journal, though the paper noted "a senior U.S. official said analysts now believe what started as an information-gathering campaign aimed at both parties later took on a focus of leaked emails about [Hillary] Clinton and Democrats." The RNC staff reportedly didn't even know they had been targeted until June, after the DNC revealed it had been infiltrated. The RNC then examined its own computer security system and in the process discovered the blocked emails that had been sent to a single former employee.

President Obama said Thursday that the U.S. will retaliate against Russia for the hack.

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