In the Assembly, Espaillat was a vocal advocate for tenants, consumers, veterans, immigrants and local businesses. He passed laws encouraging the construction and preservation of affordable housing, giving low-income day care workers the right to organize and obtain health care, and sponsored measures to improve hospital translation services. He also established a higher education scholarship fund for relatives of the victims of American Airlines Flight 587, which crashed on November 12, 2001. Despite national Republican and conservative criticism, Espaillat strongly supported efforts in 2007 to allow undocumented immigrants to obtain driver's licenses.