Spain's politicians have failed to agree on a new government, sending their country back to the polls. Benjamin Netanyahu could tell them that that's a risky strategy.
Britain's divided House of Commons is unlikely to survive much longer, but a replacement may not end up making things any clearer.
Plans are again afoot within the Australian government to try to cripple the democratic nature of the Senate. But there is an alternative direction that reform could take.
Britain won't be going to the polls next month, but it still looks as if an election can't be long delayed.
Elections in two German states this weekend provide another opportunity for pundits to fret about the rise of the far right. So far, however, the centre-right is holding firm.
Britain could be headed for a constitutional crisis that can be likened to that of 1975 in Australia. But the differences are more revealing than the similarities.
Like its Italian counterpart, the British parliament faces big decisions about whether to bring down a government and what to put in its place, but it does so under somewhat different constitutional rules.
A Welsh by-election delivers a setback for Britain's new prime minister and raises absorbing questions about how a general election might play out.
Australia and the US both apportion seats on the basis of population, but use different approaches to drawing boundaries. It could become a political issue.
The European Union may, or may not, get a new government tonight. Meanwhile, Spain's government is having parliamentary problems of its own.