Scott Maurer, whose daughter was one of the 50 people killed in the 2009 crash, said Lee was "a hard worker and a good guy" who "loved and cared for" his community.
"He was 100 percent professional with us, 100 percent supportive and seriously was considerate and concerned with aviation safety, so to hear that he's resigned is a huge loss of support for our efforts," Maurer said.
The congressman hadn't submitted his resignation to the New York secretary of state Wednesday evening, said a state official who wasn't authorized to speak on the issue and spoke on the condition of anonymity. After Lee submits his resignation, Gov. Andrew Cuomo could schedule a special election.
Cuomo, a Democrat, had no comment Wednesday night.