Politico: Spain’s new Socialist government faces its first ethical dilemma: Should Nadia Calviño, the economy and enterprise minister, be forced to resign from her job as a top European Union official in Brussels?

Calviño, who until June 6 was director general of the European Commission’s budget department, has not formally quit the EU institution, a Commission spokesperson told POLITICO.

Instead she has taken leave from her job in Brussels on “personal grounds.”

Calviño’s appointment received widespread praise — because she knows the EU inside-out and was the civil servant in charge of steering the next long-term EU budget — but those qualities could now result in a potential conflict of interest.

While negotiations on the next EU budget will likely be handled by María Jesús Montero, Spain’s treasury minister, one of Calviño’s chief tasks will be to lobby her former colleagues and political masters to get a good deal for Spain.