Rasmussen proved the most accurate during the election because their base was the least skewed by an improper ratio of Democrats or people on the left.
Via Daily Caller:
CNN is skewing polling data to show the majority of Americans disapprove of the way President Donald Trump is handling the presidency.
The network published a poll Sunday that claims 35 percent of American adults approve of how Trump is performing as president. Those results are in stark contrast to a Monday Rasmussen Reports poll that found 49 percent of respondents approved of how the president is managing the White House.
What accounts for a roughly 15 percentage point disparity?
The Daily Caller News Foundation obtained a full copy of CNN’s poll, which was conducted in conjunction with SSRS, a survey and market research firm. The data include a breakdown of respondents by age, party affiliation, income and other demographic factors. It also includes the methodologies used in conducting the poll, although some information is missing, like how CNN/SSRS chose to sample respondents.