World leaders at the Group of Seven summit in Canada scrambled Monday to find a way to contain the escalating conflict between Israel and Iran, with U.S. President Donald Trump warning that Tehran needs to curb its nuclear program before it’s “too late.

The 2018 summit ended with Trump assailing his Canadian hosts on social media as he departed on Air Force One, saying he had instructed the U.S. officials who remained in Quebec to oppose the G7 joint statement endorsed by the leaders of Japan, France, the United Kingdom, Italy, Germany and, of course, Canada.

Japanese Prime Minister Shigeru Ishiba and U.S. President Donald Trump failed to reach a breakthrough in trade negotiations aimed at reducing tariffs potentially harmful to the Japanese economy. Despite their meeting at the G7 summit,

G7 leaders condemned Iran for being the "principal source of regional instability and terror." Group of Seven leaders on Tuesday affirmed unified support for Israel and called for a resolution to the escalating regional tensions, as it trades military strikes with Iran.

G7 leaders arrived in Kananaskis, Alberta, Canada, for three days of intense discussion, amid tension in the Middle East and alliance changes.

World leaders had gathered in Canada with the specific goal of helping to defuse a series of global pressure points, only to be disrupted by a showdown over Iran’s nuclear program that could escalate in dangerous and uncontrollable ways.

Now Trump returns, both to the summit sanctum and to Canada, after a bruising tariff war and his refusal to back down from the 51st state threat. That stoked widespread anger in the country and helped fuel Carney’s spring election victory. Trump himself has claimed credit.