Sen. Susan Collins, R-Maine, told CNN on Monday she intends to support the nomination of Robert F. Kennedy Jr. as Health and Human Services secretary—news that comes ahead of the expected Senate-wide vote to confirm one of President Donald Trump’s most controversial Cabinet picks after some GOP lawmakers remained on the fence.

Senator Susan Collins says she will support Robert F. Kennedy Jr. as the next U.S. health secretary. Collins told CNN Chief Correspondent Manu Raju that she plans to vote for him and that he will re-examine the cuts made by the White House to the National Institutes of Health.

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.