President Donald Trump does not intend to sign onto a joint statement calling for de-escalation between Israel and Iran that had been drafted by G7 leaders in Canada, according to a person familiar with the matter.

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.

The U.S. president faces pushback over the risk of U.S. involvement in the escalating conflict between Israel and Iran.

President Trump arrived in Canada for the G7 summit, where the Israel-Iran conflict will be a key issue for world leaders. NBC News' Gabe Gutierrez reports on the possible pressure Trump could face to de-escalate tensions between the countries.

"The full strength and might of the U.S. Armed Forces will come down on you at levels never seen before," Trump warned.

President Trump urged Iran to return to negotiations over the future of its nuclear program to end conflict with Israel. “They should talk and they should talk immediately before it’s too late,” Trump told reporters on Monday in Canada,

CONFLICT ENTERS FOURTH DAY: Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.