Why hasn't Obama received approval from Congress, but thinks he can still stay in Libya?

Actually, we are not at war with Libya. Congress did not need to approve the military action in Libya because it was not a declaration of war. The Constitution does state (Article one Section 8) that Congress shall have the power to declare war. But the key words are "declare war". There isn't a war with Libya just military action. If Obama declared war (by himself without congressional approval) then it would be a legal issue. But as it stands, there isn't a war, which means he did not side step the law. The only reason this is an issue is because this is just political. Its not an issue but it is politics.