The resolutions blocking the sales have already cleared the US Senate and now go to the White House, where Trump is expected to issue the third veto of his presidency.
But opposition among members of Congress to the Trump administration's alliance with the Saudis has been building, fueled by the high civilian casualties in the Saudi-led war in Yemen - a military campaign the U.S. is assisting - and the killing of US-based columnist Jamal Khashoggi by Saudi agents. One Saudi airstrike killed 40 children in a school bus, with a US -made bomb.More news: The C8 is the first Corvette available as right-hand drive
The emergency permits the Trump administration to complete its arms sale worth United States dollars 8.1 billion through bypassing the US Congress.
"Rather than come and make their case to Congress, the administration invented a phony emergency to bypass the legal process for approving arms sales", said Rhode Island Democrat David Cicilline on the House floor Wednesday. The Saudis have recently faced a number of attacks from Iran-backed Houthi rebels in Yemen.
"These weapons won't counter Iranian threats".More news: Couple killed in Alaska Highway double homicide identified
"This irresponsible resolution handcuffs our ability to do so", said McCaul, of Texas. The bills were previously passed by the Republican-led Senate.
Arms packages related to this deal are worth an estimated $8 billion. It's unlikely supporters can muster the congressional super-majority that would be needed to override an anticipated Trump veto.
Rep. Eliot Engel, Democrat-New York, chairman of the House Foreign Affairs Committee, accused the Trump administration of circumventing Congress and the law to move ahead with the arms sale.More news: AB InBev to pass Australian brand to Japanese Asahi
"Apart from negatively affecting our bilateral relationship with the Kingdom of Saudi Arabia, the joint resolution would hamper our ability to sustain and shape critical security cooperation activities and would significantly hinder the interoperability between our nations", the White House said in a statement earlier this year.