The Senate health care bill would cut hundreds of billions of dollars from Medicaid, a program that Donald Trump once promised not to touch.

The Better Care Reconciliation Act unveiled on Tuesday would phase out extra money provided to states to expand Medicaid and restructure the program in ways that would reduce spending on it over the long term.

In May of 2015, one month before he launched his campaign for president, Trump told the conservative Daily Signal that he would not touch the Social Security, Medicare or Medicaid programs.

“I’m not going to cut Social Security like every other Republican and I’m not going to cut Medicare or Medicaid,” Trump said. “Every other Republican is going to cut, and even if they wouldn’t, they don’t know what to do because they don’t know where the money is. I do.”

He made the same point on Twitter, arguing that primary rival Mike Huckabee had stolen his idea:

This is not the first time Trump’s campaign promise has looked like it’s at risk. In May, the Trump Administration proposed a federal budget that incorporated cuts to Medicaid that were included in the House version of the health care bill. The Trump budget also called for an additional $600 billion reduction in the Medicaid budget over the next ten years.

Both the House and Senate versions of the bill would dramatically change Medicaid. The House bill would institute a per capita cap on how much the federal government spends on each recipient and allow states to receive a block grant instead. The Senate bill would also tie the annual growth rate to standard inflation, instead of medical inflation, causing a reduction in funds over time.

“This is a bill that would end Medicaid as we know it, rolling back Medicaid expansion, cutting federal support for the program even more than the House bill,” Senator Chuck Schumer said on Thursday.

Get our Politics Newsletter. The headlines out of Washington never seem to slow. Subscribe to The D.C. Brief to make sense of what matters most. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Jack Brewster at jack.brewster@time.com.