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.

Robert F. Kennedy Jr.'s anti-vaccine advocacy is outside the mainstream. His previous statements on abortion could alienate Republicans. But a new poll finds that not all of his controversial health goals are unpopular — in fact,