state. State in which poll was taken. `U.S` is for national polls.
startdate. Poll's start date.
enddate. Poll's end date.
pollster. Pollster conducting the poll.
grade. Grade assigned by fivethirtyeight to pollster.
samplesize. Sample size.
population. Type of population being polled.
rawpoll_clinton. Percentage for Hillary Clinton.
rawpoll_trump. Percentage for Donald Trump
rawpoll_johnson. Percentage for Gary Johnson
rawpoll_mcmullin. Percentage for Evan McMullin.
adjpoll_clinton. Fivethirtyeight adjusted percentage for Hillary Clinton.
ajdpoll_trump. Fivethirtyeight adjusted percentage for Donald Trump
adjpoll_johnson. Fivethirtyeight adjusted percentage for Gary Johnson
adjpoll_mcmullin. Fivethirtyeight adjusted percentage for Evan McMullin.