A Democratic senator introduced legislation to prevent President Donald Trump from using military force against Iran without Congress's authorization.

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.

A Democratic senator introduced legislation on Monday to prevent U.S. President Donald Trump from using military force against Iran without Congress's authorization, as an escalating battle between Israel and Iran raised fears of broader conflict.

Also looming over the meeting are President Trump's inflammatory threats to make Canada the 51st state and take over Greenland.

Former Vice President Mike Pence said on “State of the Union” Sunday that if Israel’s attack doesn’t somehow convince Iran to make major concessions in Trump’s diplomatic attempt to end its nuclear program, then the United States should be prepared to join the conflict.

Israel hit more targets in Tehran and Iranian missiles fired at Israel killed at least 14, as the conflict entered a third day

President Donald Trump said the United will come down on Iran “at levels never seen before” if the Middle Eastern country attacks.

Follow live updates as Iran retaliates after Israel strikes nuclear facilities. Stay informed with real-time news and developments.