August 25, 2016 6:11 AM EDT

Donald Trump has called NATO “obsolete,” threatening in July to renege on the U.S. commitment to protect allies under attack. Some leading figures in Europe also question the alliance’s value:

JEREMY CORBYN

The leader of the U.K.’s opposition Labour Party said on Aug. 18 he wouldn’t aid NATO allies under attack if elected Prime Minister.

BEPPE GRILLO

The founder of Italy’s antiestablishment Five Star Movement wrote in May that NATO pandered to Washington’s “strategic designs.”

PABLO IGLESIAS

The leader of Spain’s left-wing Podemos party has long called for a referendum on NATO membership.

MARINE LE PEN

The far-right National Front party leader wants France to withdraw from NATO and has called for a better relationship with Russia.

This appears in the September 05, 2016 issue of TIME.

Contact us at editors@time.com.

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