What Italy's political crisis told us about populism in Europe

The political crisis in Italy that emerged after Italian President Sergio Mattarella vetoed Giuseppe Conte's choice of finance minister quickly gave way to a compromise. But what did the affair tell us about populist politics in Italy and Europe? Ben Margulies writes that while Mattarella got his way in the end, his actions risked bringing about the very thing he was trying to prevent – an Italian exit from the euro.