Poll Average Details- US Partisan Affiliation - 2100-01-01 03:30:00

The Poll Average is a weighted and adjusted number.
[Mid Date Column] All times are calculated by the middle date of the poll if it spans multiple days.
A time window of 2 months prior to the most recent poll is used.
[Time Weight Column] Polls are weighted in the amount they contribute to the final results in a linear fashion in this time window - the newest poll has a weight of 1, a poll 30 days prior will have a weight of 0.5 and a poll 60 days out will have a weight of 0. If the same pollster has more than one poll in this time period, only the newest will be used.
[Internal Column] If a poll is marked as being an internal poll for one of the candidates, it's weight will be halved.
[Candidate Columns, Bias] OurCampaigns has calculated partisan bias figures for all Polling Firms based on data from final vote totals in races they have polled. These amounts are subtracted from the poll result - in the case the bias figure is negative it will effectively be added to the poll result and appear as two dashes (minus a negative = plus). [TOTAL Row] The adjusted weights are summed for each poll result and the adjusted poll results for each candidate are multiplied by the poll weight and then summed. Each candidate's poll sum is divided by their weight sum to give the total.

Poll	Mid Date	Time Weight	Internal	Democratic Party Control	Republican Party Control	Others Control
Rasmussen Reports	6/30	X 1.00000		35.4000 - 0.4180 bias	33.0000 - 1.5977 bias	31.6000 - bias
Gallup	6/30	X 1.00000		46.0000 - -2.6491 bias	43.0000 - 2.8840 bias	11.0000 - -5.7892 bias
Princeton Survey Research Associates	6/22	X 0.86667		35.0000 - 1.8159 bias	25.0000 - -1.1956 bias	31.0000 - bias
NBC News/Wall Street Journal (Hart & McInturff)	6/21	X 0.85000		33.0000 - 1.7306 bias	26.0000 - -0.7288 bias	36.0000 - bias
Pew Research	6/20	X 0.83333		27.0000 - 1.4784 bias	29.0000 - -1.7614 bias	34.0000 - bias
TOTAL				35.217064	31.335194	29.492132