Mamdani ‘testing the limits of his influence’ with foreign policy forays Trump to impose 50% tariffs on Canada in response to retaliatory duties Trump signs executive order aimed at tightening defense supply chains Trump vows Iran will ‘pay’ for killing US troops. What comes next? Trump rejects suggestion that Mamdani could arrest Netanyahu during UN visit Updated Daily Today's National Average Vances announce birth of their fourth child, Alec Vance won’t take paternity leave following birth of fourth child Usha Vance to visit Children’s National Hospital to mark National Reading Month PHOTOS: Usha Vance talks child literacy at hospital reading event Usha Vance announces launch of summer reading challenge prize website