Assembly Speaker Carl Heastie in a radio interview on Friday doubted whether there was enough support in the Democratic conference for the approval of the education-tax credit, a controversial measure opposed by the state’s teachers unions.

“Within our conference, there wasn’t enough support to include it in our one-house resolution or bring the vote to the floor,” Heastie told WNBF this morning. “I’m a consensus builder. We didn’t have enough support to move forward with that.”

Still, Heastie wouldn’t completely close the door to the approval of the tax credit, calling it an “open discussion.”

“The governor would like to see it and the Senate supports it, so I would say we’ll stay tuned on that issue as well,” Heastie said.

The measure is being tied by Gov. Andrew Cuomo to the approval of the DREAM Act, a bill that would give tuition assistance to undocumented immigrants.

Cuomo went further in his 30-day budget amendments, tying the approval of the Tuition Assistance Program to both the DREAM Act and the tax credit. Neither Democrats in the Assembly or Senate Republicans have introduced those amendments.

Heastie, in the interview, sounded a note of alarm over the governor tying policy such as income disclosure proposals to spending in the budget.

“This is not to say that the governor hasn’t put forward good ideas, but when you want to have a system of checks and balances, you don’t want to limit the powers of the Legislature,” he said.

Supported by private schools and non-profits, the education tax credit would seek to encourage donations to scholarship funds that service private schools as well as public schools.

A prominent supporter of the tax credit, Cardinal Timothy Dolan, cancelled his planned appearance at the Capitol next week to lobby for the measure following the death of his predecessor, Cardinal Edward Egan.

The Assembly plans to approve its one-house budget next week, which will also include an unspecified minimum wage increase.

Updated: Cuomo spokesman Rich Azzopardi weighs in in a statement, addressing the balance-of-power concerns Heastie is raising.

“The Legislature simply doesn’t have the same powers that the Governor has when it comes to the budget. These powers are directly prescribed by the constitution. On the other hand, the Legislature does have powers that the Governor doesn’t have, such as Senate confirmations and the Assembly’s control of Board of Regents elections.”