Ever since being sworn into office two months ago, President Donald Trump has been doing what he promised, at least in one area: shaking things up in the federal government. But one move he’s made to slash funding for the National Institutes of Health by $5.8 billion to $25.9 billion is causing shock and outrage among health groups, who are speaking out against the fiscal 2018 budget proposal.

Health groups argue that this move stunts research into diseases like Alzheimer’s and Zika, and it could stop scientists from finding the next cure. They argue it’s a terrible time to be cutting funding for the NIH.

Here’s what Rep. Kevin Yoder, a Republican from Kansas, said in a statement about the proposed NIH cuts.

Representative Kevin Yoder (R-KS) issued the following statement in response to the Trump Administration’s budget proposal that includes a $5.8 billion cut to the National Institutes of Health (NIH):

“More than 300 members voted to boost medical research by billions in November, we cannot turn around a few short months later and slash its budget. Funding to research cures to the 10,000 known diseases in this world, like cancer, Alzheimer’s, or Parkinson’s is a priority for every family in America, regardless of political party. I will fight to ensure that these proposed cuts to medical research funding never make it into law.”

In November, Yoder championed the 21st Century Cures Act, which passed the House 392-26. The bill increased biomedical research funding at NIH by $4.8 billion over the next decade and streamlined drug approval process at the Food and Drug Administration (FDA) to bring treatments to patients more quickly. In 2015, more than 100 House Republicans signed onto Yoder’s letter to House leadership pushing for a $3 billion NIH funding increase that eventually led to the largest funding increase for research in 12 years.