New York City Mayor Zohran Mamdani is set to join Gov. Kathy Hochul on the campaign trail Friday for the first time, as the governor steps up efforts to secure reelection ahead of the November 3 vote.

The Brooklyn appearance comes as Hochul faces Republican challenger Bruce Blakeman, the Nassau County executive, in a closely watched race that has increasingly highlighted divisions within New York’s Democratic Party.

Although Mamdani endorsed Hochul after winning the Democratic mayoral primary last year, their relationship has largely played out through official appearances and campaign advertisements rather than joint campaigning. Mamdani has promoted the governor’s reelection bid, particularly pointing to her backing of his universal childcare proposal.

Hochul has emphasized her administration’s planned investment of roughly $2 billion in New York City childcare, including expanded 3-K availability and a pilot program for 2-K. Her campaign has highlighted the initiative as a major achievement and a central area of cooperation with the city’s new mayor.

The partnership also reflects Hochul’s effort to energize progressive voters by working alongside prominent figures on the party’s left, including Mamdani and Rep. Alexandria Ocasio-Cortez. However, previous appearances before Mamdani’s supporters have exposed tensions over Hochul’s more moderate political positions, with crowds chanting demands to tax the wealthy at past events.

Blakeman welcomed the planned joint appearance, arguing that an alliance with Mamdani could benefit his own campaign by pushing some Democrats and independent voters toward the Republican challenger. He has sought to portray the governor’s association with the democratic socialist mayor as a political liability.

Friday’s event will offer a more direct test of how the two Democrats campaign together as Hochul seeks to unite the party’s moderate and progressive wings in the final stretch before Election Day.