WASHINGTON - US military action in Libya isn't at a level that would require congressional approval as outlined in the War Powers Act, President Barack Obama insisted Wednesday. "I said there would be no troops on the ground. I said that we would not be carrying the lion's share of this operation, but as members of NATO we would be supportive of it because it's in our national security interests and also because it's the right thing to do," Obama said while responding to questions at a news conference. "We have done exactly what I said we would do." A number of congressional Democrats and Republicans have expressed dismay over Obama's failure to seek congressional approval for the US presence in Libya, with some saying they will work to strip funding for Libyan operations.