Europe and Ukraine's leaders will speak to U.S. President Donald Trump at a virtual meeting on Wednesday ahead of his summit with Russia's Vladimir Putin, as they try to drive home the perils of selling out Kyiv's interests in pursuit of a ceasefire.

The Europeans and Ukraine are wary that Putin might secure favorable concessions and set the outlines of a peace deal without them.

European leaders appealed to President Trump to defend their security interests at a key summit with Russian President Vladimir Putin.