Republican Representative Ashley Hinson publicly broke with Donald Trump as she called for an immediate end to the war in Iran, just hours before a new poll showed her trailing Democratic challenger Josh Turek by 8 points in Iowa’s U.S. Senate race.

Hinson, who previously enjoyed Trump’s endorsement, posted on social media that Iowans are being squeezed by high prices at the pump and checkout lines due to the conflict and urged actions such as suspending the gas tax and pausing diesel exports to lower costs. The polling shift and her public divergence highlight growing political pressure in Iowa’s competitive race to succeed retiring Senator Joni Ernst.