By Jason Lange

WASHINGTON, June 23 (Reuters) - Just one in four Americans believes President Donald Trump's war with Iran was worth its costs and a majority worry that a truce with Tehran is unlikely to last, a Reuters/Ipsos poll found.

The five-day poll, which closed on Monday, also showed the war weighing heavily on Trump's popularity, with his approval rating dropping to 34%, a return to the lowest level of the Republican's second term that was last touched in an April survey.