State-controlled CTG was there when Portugal needed friends during its bailout. EDP is lumbered with too much debt, constraining its ability to grow on its own. Any European takeover — the names rumoured have been Engie SA and Gas Natural SDG SA — would be likely to lead to job cuts or a partial break-up. Domestic assent for the move, therefore, looks easy to grasp.
But what works for Portugal may not work for the whole of Europe, nowadays sounding more interventionist on foreign direct investment. EDP's American assets mean the U.S. would also want its say.
Assuming CTG can overcome political obstacles. Then it needs to persuade holders of at least 27 per cent of the stock to accept its offer — ideally not many more — while also deterring any rival interest.