The proposed version of the legislation boosts the standard deduction and increases the child tax credit, which would also start early.

Trump posted on social media that hiking taxes on anyone, even the rich, could stir a political backlash, reviving the “Read my lips: No new taxes” warnings of the Bush-era that helped topple a president. The post came days after he floated the idea of higher taxes on those single filers earning $2.5 million and above.

Trump and his aides have sent mixed signals about an idea that runs counter to decades of Republican orthodoxy.