The power to trigger such a referendum does not reside with the Stormont parties, but the secretary of state.

BBC: Border poll considered by DUP, says Foster

They infiltrate electrical substations and trigger power outages, including one in January at the island's biggest shopping mall.

WSJ: To Battle Iguanas, Puerto Rico Has New Plan: Put Them on Menu

Rather than allowing companies to get the best from both bosses, they trigger damaging internal power struggles as each jockeys for the upper hand.

ECONOMIST: Schumpeter