Looking at France panicking because 2 weeks after snap election there isn’t a clear majority, nor a coalition ready to propose a prime-minister to the president. What would be the standard time to do these negotiations in a functional democracy where doing coalition is common but doesn’t take years (so US and Belgium do not coun :) )
EDIT : Need not Name
Surely Belgium holds the record.
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I believe Iraq did worse but it’s not really comparable. That’s why I excluded them from the question