SP 800-100, Information Security Handbook: A Guide for Managers (October. 2006 ), is available at: http://dx.doi.org/10.6028/NIST.SP.800 -10 0. (redirects to http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800 -1 00.pdf ).
What percent of registered voters are Republican? As of 2011, Gallup polling found that 31% of Americans identified as Democrats (tying a 23-year low), 27% as Republicans, and 40% as independents (largest in 60 years).
Outside of the 1960s, the tightest races of the 20th century produced popular-vote margins roughly comparable to Obama-Romney. In 1916, Woodrow Wilson won a second term with a popular-vote victory of 49.2 percent, to 46.1 percent for Republican stalwart Charles Evans Hughes.