A dual-citizenship row rattles the Australian government

WHEN two Australian Greens senators left parliament last month after learning that they were dual citizens, and thus in breach of the constitution, Malcolm Turnbull, the prime minister, condemned their “incredible sloppiness”. But on August 14th Barnaby Joyce, the deputy prime minister, revealed that he, too, was a citizen of two countries: Australia and New Zealand. His confession sparked a rare diplomatic row between the two countries. It also casts doubt on the survival of Mr Turnbull’s government, which clings to power with a majority of one.