US Representative Nancy Mace, a Republican, has called for a vote before any US troop deployment to Iran, arguing that Congress should have a say in such decisions. This comes amid concerns over the administration's plans, with the Pentagon reportedly preparing for limited ground operations in Iran. Despite general support for war, several Republicans believe boots on the ground would be a political Rubicon for US President Donald Trump. The decision could test the limits of using air power to fully degrade Iran’s military capabilities, destroy its nuclear programme, or achieve regime change. Despite this, some Republican lawmakers have generally supported Trump, while others have condemned the war.