Former US Vice President Joe Biden still leads the Democratic pack of presidential contenders in a poll of Iowa voters, with Bernie Sanders, Elizabeth Warren and Pete Buttigieg in a tight battle for second place.
Biden is the first choice of 24 per cent of likely Democratic caucus-goers in Iowa, the state that kicks off the presidential nominating race next February, in the Des Moines Register/CNN/Mediacom Iowa Poll.
Sanders, a US senator, is the first choice for 16 per cent of respondents, while Warren, also a US senator, and Buttigieg, the mayor of South Bend, Indiana, are at 15 per cent and 14 per cent, respectively. No other candidate managed double-digits.
US Senator Kamala Harris registered seven per cent, and U.S. Senator Amy Klobuchar and former Texas Congressman Beto O'Rourke are both at two per cent. Seven candidates registered one per cent.
More than 20 Democrats are vying for the right to challenge Republican President Donald Trump, who will formally launch his re-election bid on June 18. Biden has been the consistent leader in most national and state polls since he first entered the race in late April. Sanders runs second to Biden in most polls.
