Video on
msnbc.com: The
Senate is expected
to take up a key
vote on the
Keystone XL
pipeline Tuesday.
CNBC's John
Harwood reports on
how the vote
(more)
Video on msnbc.com: The Senate is expected to take up a key vote on the Keystone XL pipeline Tuesday. CNBC's John Harwood reports on how the vote may turn out.