US President Donald Trump's administration plans to use a loophole and rising tensions with Iran to sell bombs to Saudi Arabia, even though Congress blocked such sales for months over concerns about civilian deaths in the war in Yemen, Senator Chris Murphy said on Wednesday."I am hearing that Trump may use an obscure loophole in the Arms Control Act and notice a major new sale of bombs to Saudi Arabia (the ones they drop in Yemen) in a way that would prevent Congress from objecting. Could happen this week," the Democratic senator warned on Twitter.Congressional aides said there are provisions of the Arms Control Act, which sets rules for international arms transactions, that would allow a president to approve a sale without congressional review in case of a national emergency.In this case, they said the Republican president would cite rising tensions with Iran as a reason to provide more military equipment to Saudi Arabia, which he sees as an important U.S. partner in the region. Trump has touted arms sales to the Saudis as a way to generate US jobs.Trump previously declared an influx of immigrants a national emergency to bypass Congress and get $6 billion to build his wall along the Mexican border. Both Democrats and his fellow Republicans voted to block the move, forcing Trump to issue the first veto of his presidency.It was not immediately clear what equipment would be sold to Saudi Arabia or when any sale might go ahead.