U.S. President Donald Trump has increasingly flashed frustration with the war in Iran, as the conflict that his team once predicted would end in a matter of weeks stretches into its fifth month and fighting intensifies.

The war¡¯s seemingly intractable new chapter has unleashed fresh economic turmoil and driven up energy prices, which threatens to further imperil Republicans¡¯ already dim prospects in the November midterm elections. Yet since his ceasefire with Iran collapsed, Trump has voiced anger about recent U.S. casualties and expressed skepticism about returning to negotiations.

A leader who has long resisted the path of retreat, Trump has now gone into revenge mode against the Islamic Republic, according to one ally who spoke on condition of anonymity to discuss his thinking. The president is frustrated with the state of the war and is looking to exact a toll on Iran, said another person familiar with the matter.?