The Congressional Budget Office said on Thursday that making the 2017 tax cuts permanent and adding other tax breaks sought by President Donald Trump would add $6 trillion to the deficit over the next decade, giving ammunition to Democrats who argued that the GOP tax agenda would harm the economy.

The office, which is Congress’s nonpartisan in-house budget scorekeeper, also projected that the added debt would raise interest rates and thus slow growth in the long term, a contrast to a recent analysis from the White House Council of Economic Advisers that extending the tax cuts would send growth and wages soaring.

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