An aide to Sen. Bob Menendez (D-NJ) aiming to have then-Vice President Joe Biden host an event in 2010 first reached out to a business partner of Hunter Biden with the request, emails on the first son’s abandoned laptop show. Danny O’Brien, who served as Menendez’s chief of staff from 2008 to 2015, called Eric Schwerin, Hunter’s associate at Rosemont Seneca Partners, around April 2010 to discuss the annual meeting of the US-Spain Council — which works to build ties between Washington and Madrid. “Danny wants to explore with you possibility of getting VP to host event at NAVOBs for...