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Mick Ryan, a senior fellow for military studies at the Lowy Institute, said a range of issues would need to be resolved to give Trump’s counterpart, Russian President Vladimir Putin, a reason to end the war.
What has Donald Trump said?
“But I’ll be asking the crown prince, who’s a fantastic guy, to round it out to around $1 trillion ($1.6 trillion),” Trump told the forum. “I think they’ll do that because we’ve been very good to them.”

The price of US crude oil, from 2002 to 2024. Source: SBS News
Trump later reiterated his call for OPEC to cut oil prices when speaking to reporters in North Carolina.
OPEC was formed in 1960 by Iraq, Iran, Kuwait, Saudi Arabia and Venezuela, and now has 12 member countries. In 2016, a grouping of oil-producing countries including Russia, Kazakhstan and Mexico became part of OPEC+, which works with OPEC on oil initiatives.
How could lowering oil prices end the war in Ukraine?
OPEC+ members agreed on Monday night to continue with that plan. The organisation is next set to meet in early April.

The world’s top exporters of crude oil in 2023. Source: SBS News
Broadly speaking, Widmaier said this is an area where Trump’s worldview is most appropriate.
“Even if they [the Saudis] were to do it, you would have to wonder that it would have the effect on Putin.”
“It could have an impact. But I doubt very much it will have the significant impact that the current US administration is describing it would have.”
What has Russia — and OPEC+ — said?
“The conflict is ongoing because of the threat to Russia’s national security, the threat to Russians living on those territories and the refusal by the Americans and the Europeans to listen to Russia’s security concerns. It’s not linked to oil prices.”
“There’s a whole range of military, societal, political and alliance issues that also need to be resolved to give Putin a reason to want to end this war.”
What impact would failing oil prices have in Australia?
With additional reporting by Reuters.