U.S. President Barack Obama said on Tuesday that he was confident that Congress would approve a U.S. military action on Syria. \"We will be stronger if we take action together as a nation,\" Obama said at a meeting with congressional leaders at the White House. \"What we are envisioning is something limited and proportional. It will degrade (Bashar) al-Assad\'s capabilities,\" he said. \"This is not Iraq and this is not Afghanistan.\"