Pakistan, Jan. 13 -- US President Donald Trump has announced a 25 percent tariff on any country conducting trade with Iran, escalating pressure as the Islamic republic continues to face widespread protests. The announcement, made via social media, warned that the levies would "immediately" target Iran's trading partners who also do business with the United States, though Trump did not specify which nations would be affected.

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Iran's main trading partners include China, Turkey, the United Arab Emirates, and Iraq. The tariff threat comes amid nationwide demonstrations sparked by economic grievances, defying government-imposed internet blackouts and violent crackdowns....