Without having proven his case to Congress or the U.S. people, President Obama is bringing his drive for war against Syria to the G20 summit, where his attempts to sell the strikes to global leaders are being met with mixed reception and, in some cases, fierce opposition.

The Chinese government declared in a pre-G20 briefing that it joins Russia—host of the summit—in standing against proposed military strikes. Chinese deputy finance minister Zhu Guangyao declared, “Military action would have a negative impact on the global economy, especially on oil prices – it will cause a hike in the oil price.”

Meanwhile, the rift between Obama and Russian President Vladimir Putin appears to be growing, after Putin escalated language opposing strikes Wednesday, levying charges that U.S. Secretary of State John Kerry “is lying and knows he is lying,” and Russian government officials announced a 100-page report they claim shows that the opposition against President Bashar al-Assad carried out chemical weapons attacks earlier this year.

Catholic church head Pope Francis wrote a personal letter to Putin, ahead of the G20 meetings, making a “heartfelt appeal” to world leaders to prevent the “futile pursuit of a military solution.”