Venezuela’s President Nicolás Maduro speaks at a news conference in Caracas on Tuesday. Reuters CARACAS—Rafael Ramírez, who has overseen Venezuela’s oil industry for more than a decade, was removed from that role late Tuesday in a cabinet shake-up announced by President Nicolás Maduro. As part of the shake-up, Mr. Ramírez was appointed foreign minister. Venezuela’s then-energy minister, Rafael Ramírez, attends an OPEC meeting in December 2011 in Vienna. Agence France-Presse/Getty Images Mr. Ramírez had served as Mr. Maduro’s top economic adviser and was scheduled to lead an investor roadshow this month in New York in search of financing for the cash-strapped government. He was one of the most vocal proponents of economic overhauls such as slashing domestic gasoline subsidies and simplifying a cumbersome foreign-exchange system, two areas where the government has been bleeding money. The cabinet changes come as Mr. Maduro’s approval rating has tumbled to 35.4% as he […]