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"Data USA puts public US Government data in your hands. Instead of searching through multiple data sources that are often incomplete and difficult to access, you can simply point to Data USA to answer your questions.
"Since 1948, ANES has conducted surveys, usually administered as in-person interviews, during most years of national elections. This series of studies, known as the ANES “Time Series,” constitutes a pre-election interview and a post-election interview during years of Presidential elections, and, usually, a post-election interview only during years of midterm elections. Topics cover voting behavior and the elections, together with questions on public opinion and attitudes."