City Unions Plead Not to Ban the Horse-drawn Carriage Industry.

The Central Labor Council, an umbrella group representing more than 1.3 million workers, fired off a letter to de Blasio and the City Council pleading with them not to axe the “iconic and thriving industry.”

“As one of New York City’s top three tourist attractions, the industry provides millions of dollars in revenue as well as hundreds of reliable, well-paying middle-class jobs,” the letter reads.

It was signed by two dozen union leaders, many of whom are leading the charge on other de Blasio initiatives, including his proposal to raise taxes on the wealthy to pay for universal prekindergarten and his push for a state law allowing the city to set its own minimum wage.

The signers included United Federation of Teachers President Michael Mulgrew; Hector Figueroa, head of the service workers union SEIU Local 32BJ, and Central Labor Council President Vincent Alvarez. It’s the first time any union leader has spoken out against a de Blasio policy.