BOSTON: A federal judge ​on Monday blocked US President Donald Trump’s administration from implementing a new ‌rule that ‌would ​limit ‌how ⁠long ​foreign students and ⁠journalists can remain in the US without applying for ⁠extensions. US District ‌Judge ‌F. ​Dennis ‌Saylor in ‌Boston ruled in favor of a coalition of ‌unions and advocacy groups just ⁠a ⁠day before the US Department of Homeland Security’s rule was set to take effect.