| | During the early stages of the 2020 presidential campaign, former Vice-President [[Joe Biden]] dominated the polling for the Iowa caucus, averaging 20-30% of the vote. Beginning in August 2019, the situation became more fluid, with Biden, [[Elizabeth Warren]], [[Pete Buttigieg]], and [[Bernie Sanders]] all dominating the field at different times. In the latest poll by YouGov and CBS News, covering the period January 22-31, 2020, Biden and Sanders were tied with 25% of the vote each.<ref>https://www.cbsnews.com/news/election-2020-battleground-tracker-what-could-happen-in-iowa-monday-2020-02-02/</ref> | | During the early stages of the 2020 presidential campaign, former Vice-President [[Joe Biden]] dominated the polling for the Iowa caucus, averaging 20-30% of the vote. Beginning in August 2019, the situation became more fluid, with Biden, [[Elizabeth Warren]], [[Pete Buttigieg]], and [[Bernie Sanders]] all dominating the field at different times. In the latest poll by YouGov and CBS News, covering the period January 22-31, 2020, Biden and Sanders were tied with 25% of the vote each.<ref>https://www.cbsnews.com/news/election-2020-battleground-tracker-what-could-happen-in-iowa-monday-2020-02-02/</ref> |