Kennedy’s commitment to walk away from the potential windfall is a major reversal for the nominee, who in his ethics plan submitted to federal officials earlier this month told lawmakers he was entitled to those proceeds so long as the U.S. government wasn’t involved.

With a committee vote scheduled Tuesday for Robert F. Kennedy Jr.'s confirmation to lead the Department of Health and Human Services, Senate Democrats are demanding more details on the nominee's connections to vaccine lawsuits and are saying Kennedy should promise to recuse himself from any vaccine-related decisions if confirmed health secretary.