As Kamala Harris and Donald Trump enter the final days of their close-fought White House contest, Europe is jittery about the potential impact of the U.S. presidential election on the war in Ukraine and the continent's security.

"A half-sentence uttered in a farm in southern Idaho brings everybody from Porto to Helsinki to panic," Austrian Foreign Minister Alexander Schallenberg quipped, urging Europeans to stay calm to avoid feeding a sense of insecurity.

Finnish President Alexander Stubb said "all of us are waiting for the elections to be over" due to their international ramifications.