Pollfish showed no Republican Convention bounce for Donald Trump and a solid Democratic Convention bounce for Hillary Clinton. In contrast, traditional polling, aggregated on Huffington Post’s Pollster , showed a bump for Trump of historically average magnitude coming out of his convention. Access to Big Data on all registered voters in the US helps us to focus on a stable space of likely voters. Second, the Pollfish survey makes no attempt to adjust its sample of respondents to their probability of responding, the basis of traditional polling. We are still waiting for the polling from the Democratic Convention, which will come out in the next few days.

Source: Huffington Post July 31, 2016 13:30 UTC