Ukrainian President Volodymyr Zelenskyy rejected President Donald Trump’s idea that Russia and Ukraine are like kids at the playground who would be better off fighting for a while before being pulled apart.

President Donald Trump said Wednesday that Vladimir Putin intends to retaliate “very strongly” against Ukraine for a surprise drone strike on Russian airfields over the weekend, a declaration that provoked alarm in Washington and abroad even as Trump touted his efforts to bring peace to the region.