Independent presidential candidate and notable anti-vaccine activist Robert F. Kennedy Jr. has tapped Nicole Shanahan, a wealthy Silicon Valley lawyer, as his running mate. Shanahan previously contributed $4 million to Kennedy’s super PAC, helping to bankroll a 30-second campaign ad during this year’s Super Bowl.

Shanahan, who was formerly married to Google co-founder Sergey Brin, has donated heavily to Democratic candidates in the past. In the campaign announcement speech, Kennedy…