BUZZ-TransCanada Corp: Obama threatens to veto Keystone bill if Congress passes it
** Canadian pipeline company's U.S.-listed shares down 3.6 pct at $45.75; Toronto-listed shares down 3.5 pct at C$53.86
** U.S. President Barack Obama would not sign a bill approving the Keystone XL oil pipeline from Canada if it passes under the new Republican-led U.S. Congress, the White House says
** Keystone XL project, which could carry Alberta oilsands to the U.S. Gulf Coast, has been awaiting U.S. presidential permit for more than six years amid bitter opposition from environmental groups
** Company's Toronto-listed stock rose 17 pct in 2014, while the U.S.-listed shares gained 7 pct
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