President Joe Biden has nominated Cindy McCain to serve as the U.S. representative to the U.N. Agencies for Food and Agriculture, the White House said. McCain, the widow of longtime Republican Sen. John McCain (R-Ariz.), has a relationship with Biden that spans decades; she also endorsed the president during the 2020 election. “I am deeply honored and look forward the [sic] work ahead,” McCain said on Twitter. Jack Markell, the former Democratic governor of Biden’s home state of Delaware, is also among 17 “key” nominees announced by the White House. If confirmed by the Senate, Markell will become the U.S. ambassador to the Organization for Economic Cooperation and Development. Others include Claire Cronin as the nominee for U.S. ambassador to Ireland, and Michael Carpenter as U.S. ambassador to the Organization for Security and Cooperation in Europe. McCain previously described Biden during the 2020 presidential race as a leader who can cross party lines and …