World leaders reacted with horror as a pro-Trump mob assaulted American democracy and the peaceful transfer of power by storming the U.S. Capitol on Wednesday, as lawmakers were attempting to certify President-elect Biden's victory in November.

Why it matters: The U.S. State Department is typically a leading voice in condemning political violence all over the world.

What they're saying

U.K. Prime Minister Boris Johnson:"Disgraceful scenes in U.S. Congress. The United States stands for democracy around the world and it is now vital that there should be a peaceful and orderly transfer of power."

Canadian Prime Minister Justin Trudeau, according to the Toronto Star: "Obviously we’re concerned and we’re following … the situation as it unfolds. There is an important electoral process unfolding in the United States and I think we all want it and need it to unfold properly and peacefully. And so we certainly hope things will calm down.”

NATO Secretary-General Jens Stoltenberg: "Shocking scenes in Washington, D.C. The outcome of this democratic election must be respected."

EU foreign policy chief Josep Borrell Fontelles:"In the eyes of the world, American democracy tonight appears under siege. This is an unseen assault on US democracy, its institutions and the rule of law. This is not America. The election results of 3 November must be fully respected."

Dutch Prime Minister Mark Rutte: "Horrible images from Washington D.C. Dear [Donald Trump], recognise [Joe Biden] as the next president today."

French foreign minister Jean-Yves Le Drian, translated: [Violence against American institutions is a serious attack on democracy. I condemn them. The will and vote of the American people must be respected.]

Norwegian Prime Minister Erna Solberg: "Unbelievable scenes from Washington D.C. This is a totally unacceptable attack on democracy. A heavy responsibility now rests on President Trump to put a stop to this."

Anadolu Agency, Turkish state media: "Turkey invites all parties in US to use moderation, common sense to overcome this domestic political crisis. Turkey concerned over developments in US, urges calm and lawful solution to problems, says parliament head."