WASHINGTON (AP) — President Donald Trump’s approval rating on the economy has slumped over the past month as the Iran war drives prices higher, according to a new AP-NORC poll, with even Republicans showing less faith in his leadership.

The findings from The Associated Press-NORC Center for Public Affairs Research show a president who is struggling with unfulfilled promises to tame inflation and testing Americans’ patience with a conflict in the Middle East that has dragged on longer than expected.

Trump’s approval rating on the economy dropped to 30% in April from 38% in a March AP-NORC poll. A similarly low share of U.S. adults, 32%, approve of the president’s leadership on Iran, which is unchanged since last month.

The poll was conducted April 16-20, during which time the Strait of Hormuz was reopened by Iran, then closed again, an example of the whiplash that has characterized the conflict.

The president’s policies and pronouncements have often been at odds with each other. Gasoline prices — which he promised to slash — jumped after the U.S. attacked Iran in February. His tariffs have kept much of the economy in limbo and hiring has slowed despite his boasts of a “golden age.”

Only 33% of U.S. adults approve of Trump’s overall job performance, down slightly from 38% last month.

Trump’s falling approval ratings could create problems for his party as it tries to defend House and Senate majorities in the midterm elections. The poll finds that Trump is especially weak on cost of living, and enthusiasm about Trump’s performance has waned over the past year among his own supporters.