Trump has often been a disruptor at global gatherings, badgering U.S. allies and competitors alike. But the dynamic could be different in 2025.

If there is a shared mission at this year’s G7 summit, which begins Monday in Canada’s Rocky Mountains, it is a desire to minimize any fireworks at a moment of combustible tensions.

Yet they may struggle to achieve a common position.

It’s a tableau no world leader — except perhaps President Donald Trump — wants to repeat. Convening in the Canadian Rockies for this week’s Group of 7 summit, presidents and prime ministers are hoping to avoid the acrimony that pervaded the last time this country played host to the world’s most exclusive club.

President Donald Trump on Sunday issued a stark warning to Iran against retaliating on U.S. targets in the Middle East while also predicting Israel and Iran would “soon” make a deal to end their esca...

Israel’s strikes on Iran and Tehran’s retaliation, which appeared to catch many world leaders unawares, is the latest sign of a more volatile world as Trump seeks to withdraw the U.S. from its role a...