European leaders will gather Monday to plot a rough path forward on defense. Wavering support from President Trump is likely to drive the debate.

French President Emmanuel Macron said on Monday that Russia's invasion of Ukraine and the policies of U.S. President Donald Trump were pushing Europe to take more responsibility for its own physical and economic security.

European Union leaders gather on Monday to discuss how to bolster the continent's defences against Russia and how to handle U.S. President Donald Trump after his decision to impose tariffs on goods from Canada,

President Trump’s threats are carrying more weight after his moves against Canada, Mexico and China. Europe has been preparing for the possibility of a trade war for months.

The threat of a transatlantic trade war loomed large Monday over a gathering of European leaders aimed at boosting the continent's defences in the face of an aggressive Russia.