US President Donald Trump has pledged to treat any armed attack on Qatar as a threat to the United States’ own security, according to a document published on Wednesday that says US forces could step in to defend the Middle Eastern nation. AdvertisementQatar on Wednesday welcomed Trump’s order, describing it as a milestone in strengthening defence ties and bilateral cooperation, its foreign ministry said. The executive order – which appears to significantly deepen the US commitment to Qatar – comes after Israel last month attempted to kill leaders of Hamas with an air strike on Doha. Qatar has been a key mediator between the US and Israel and Hamas over the war. 03:44 Explosions rock Doha as Israeli air strike targets Hamas leaders in Qatar Explosions rock Doha as Israeli air strike targets Hamas leaders in Qatar“The United States shall regard any armed attack on the territory, sovereignty, or critical infrastructure of the State of Qatar as a threat to the peace and security of the United States,” the order said.