New York City Mayor Bill de Blasio will headline a political fundraiser in Iowa next month, a visit sure to stoke 2020 speculation for one of the country’s most prominent liberal officeholders.

De Blasio, who was elected to a second term as mayor earlier this year, will be the featured guest for Progress Iowa’s “holiday party” fundraiser Dec. 19 at the Temple for the Performing Arts in Des Moines.

“Iowans are speaking out and showing up to fight back against what conservatives are doing to their state and our country,” de Blasio said in a statement released by Progress Iowa. “Standing up for quality public education, access to health care, and to make sure working families get a fair shot matters in Iowa and New York, and I can’t wait to discuss those ideas as well as how we can work together when I visit in December.”

Visits to Iowa, which hosts the first-in-the-nation caucuses, by nationally prominent politicians are frequently read as moves to test the waters of a presidential run. De Blasio has said he will not run for president in 2020, pledging during a mayoral campaign forum last August to serve his full term if re-elected – a term that runs through 2021.