right of passage. with fair-goers and check out the famous butter cow. iowans are get a dose of candidates on the air wave s came camera, elizabeth warren in western iowa, explaining wise she's labeled the president as a white supremacist. >> it's just one piece of evident after an. >> i believed everything the president says is done to encourage white supremacists. i'm not sure there's much of a distinction. >> as the 2020 field descends on the hawkeye state, a new poll of likely caucus-goers shows biden leading on to his lead. he's trailed by a rise iing war.