What to Know New York City Mayor Bill de Blasio was one of just two Democratic presidential candidates to receive zero support in a new poll

The poll asked 600 voters who are likely to participate in the 2020 Democratic caucuses about their first and second presidential choices

De Blasio and Miramar, Florida Mayor Wayne Messam were the only candidates who weren't picked as anyone's first or second choice

New York City Mayor Bill de Blasio was one of just two Democratic presidential candidates to receive zero support in a new poll.

A Des Moines Register/Mediacom/CNN Iowa Poll asked 600 registered voters who are likely to participate in the 2020 Democratic caucuses who their first and second choices for president were, the Des Moines Register reported.

Twenty four percent of those voters chose Joe Biden as their first choice; 16 percent chose Bernie Sanders; 15 percent chose Elizabeth Warren; 14 percent chose Pete Buttigieg; and 7 percent chose Kamala Harris, according to the outlet.

All of the remaining candidates were listed as a first choice by at least one respondent — except de Blasio and Miramar, Florida Mayor Wayne Messam.

De Blasio and Messam were the only candidates who weren't picked as anyone's first or second choice for president, the outlet reported.

De Blasio officially announced his candidacy last month.