Landrieu knew it wouldn't pass.
The latest Obama decision to push back an actual decision on approval of the Keystone XL pipeline has put Democrats running in swing states in a tough position: go along with the leader of their party or break with Obama in order to try to win more moderate voters, with whom the Keystone XL pipeline is relatively popular.
Recycling is fine. Conservation is fine. But sometimes greenies cross the line. They expect you and me to go jobless and hungry so they can save a porcupine.