Keystone XL pipeline
Trudeau said he needs to do a better job emphasizing more sustainable energy production.
TransCanada issued two challenges against the Obama administration Wednesday.
Regulators initially approved the path through the state in 2010.
Environmental activists are setting their sights on new battles over fossil fuels.
If the trade deal passes, it will further limit the ability to block such corporate projects.
Clinton is pledging to build on the work Obama has done on climate change.
White House officials say Obama will decide on the project before leaving office.
How will the Liberal Party's victory impact the US?
The GOP contender also vowed to end Obama's climate rule for power plants.
Canadian Prime Minister Stephen Harper defended his work on approving the Keystone XL Pipeline...
Nebraska Gov. Pete Ricketts (R) is continuing to push President Obama to approve the Keystone XL...
He's earned the trust of the average American, something campaign fundraising can't buy.
Sanders told a Minnesota audience he opposes two pipeline projects crossing the state.
API President Jack Gerard took on opponents of Keystone XL and fossil fuels Tuesday.
Lawmakers will vote on 38 amendments to an energy overhaul bill this week.
Company said it was "inappropriate" to ask officials to move forward on the process.
Kerry said the world should focus on moving toward a low-carbon economy.
TransCanada said it is "considering all options" after Obama denied the project Friday.
Sanders said Obama should "absolutely" reject the pipeline project this month.
She defended her slow opposition to the project.
"I can't wait too much longer," Clinton says.
For the second day in a row, Hillary Clinton fought off a question about Keystone.
Hillary Clinton refused to state a position on Keystone XL on Monday.