Kelly wrote a letter to Coburn arguing that cutting that funding "would jeopardize our collective efforts to safeguard New York City," according to the New York Daily News.
"I got his letter," Coburn said according to the New York newspaper. "Grow up!"
Coburn added that "everybody is gonna get cut" as Washington works to rein in the nation’s deficit.
"So they've got to grow up a little," he said.
The amendment was rejected by the Senate on Wednesday in a 48-51 vote.