The US Senate Foreign Relations Committee has backed the draft resolution authorising the use of military action in Syria by 10 votes to seven.
The draft resolution will still have to be approved by Congress.
Obama made a personal appeal to the international community to unite in military action against 'barbarism' in Syria.
President Obama has received the support of prominent Republicans as he tries to gain backing for military action in Syria.
President Obama and his team are engaged in frenzied lobbying as lawmakers prepare to vote on a possible military strike in Syria.