The Republican said she received several assurances from Robert F. Kennedy Jr. on vaccines, although many public health organizations strongly opposed his nomination because of his legacy of questioning the safety and efficacy of vaccines.

The Senate plans a key vote Monday to advance the nomination of Tulsi Gabbard, President Donald Trump’s controversial pick to serve as director of national intelligence. The move could clear the way for the full Senate to vote on Gabbard’s confirmation later this week.

The Republican senator from Maine said she will vote to confirm Robert F. Kennedy Jr. to be the next secretary of U.S. Department of Health and Human Services.