Two New York Republican lawmakers promised to block their party’s signature tax legislation unless GOP leaders raise a proposed $30,000 limit on the federal income tax deduction for state and local taxes.

Trump’s 2017 tax law lowered overall rates, but it also capped this deduction at $10,000. The new cap hit hardest in high-cost suburbs — where expensive houses come with big property tax bills — in states that also charge their own income tax, like New York.