Biden Has a Weak Link on Energy and Ethics— an Ex-Obama Official With Deep Fossil Fuel Ties

Ken Salazar, the Obama administration’s first-term interior secretary, took a job at an industry law and lobbying firm just months after leaving office. There, he refashioned himself as an oil champion and avoided disclosing the companies that paid him to lobby.

Now Salazar has a new role: adviser to Democratic presidential candidate Joe Biden.

In June, after Biden clinched the Democratic presidential nomination, the campaign added Salazar, 65, to its list of potential transition team recruits. And earlier this month, the former vice president tapped the self-described “12th-generation son...