Rep. Alexandria Ocasio-Cortez (D-NY) took the stage at New York Mayor Zohran Mamdani‘s inauguration ceremony on Thursday, cementing her alliance with the socialist as he tests his leftist ideas from Gracie Mansion.

The congresswoman from the Bronx praised New York City voters for electing Mamdani, calling their choice an “ambitious pursuit” during the inauguration ceremony. Ocasio-Cortez championed Mamdani and his progressive platform during his campaign against former New York Gov. Andrew Cuomo and Republican Curtis Sliwa. Sen. Bernie Sanders (I-VT), who also campaigned with the socialist mayor, administered Mamdani’s public oath of office on Thursday.