Other transport workers had joined the striking metro workers in solidarity on Friday and a big rally was planned to protest against a public sector unified wage scheme that would see their salaries reduced by up to 25%.

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Hillary Clinton promised solidarity with the labor movement at a rally Monday in New York City, in an appearance that highlighted the perils that ostensibly centrist candidates face in vying for the support of unions.

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His chief challenger, Nawaz Sharif, declared at his rally he was cancelling his campaigning the next day in sympathy and solidarity.

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