The Senate website states the legislation failed to pass the Senate by a 59 to 41 vote, with 60 votes needed for passage. Last week, the House of Representatives approved an identical bill authorising construction of the pipeline in a 252-161 vote. 

TransCanada Corporation held a teleconference yesterday to discuss the results of the Senate vote and the fundamental reasons why the pipeline is in the national interest of the USA and should be built.

Since TransCanada first filed its proposal in 2008, the 1,897 km pipeline has been plagued by community opposition and approval delays.

The House of Repr...