US media have reported that the Iran war could be costing as much as $2 billion a day, underscoring the scale of the burden US President Donald Trump has asked lawmakers to approve a massive $1.5tn defence budget for 2027, as the United States faces rising costs from its war with Iran and mounting global security commitme... Key points and original sources are listed below.

• US media have reported that the Iran war could be costing as much as $2 billion a day, underscoring the scale of the burdenS1

• US President Donald Trump has asked lawmakers to approve a massive $1.5tn defence budget for 2027, as the United States faces rising costs from its war with Iran and mounting global security commitme...S2