How did the Keystone XL pipeline debate raise questions about the balance of power between different levels of government

Keystone XL – the 2,000 mile tar sands pipeline that would stretch from Canada to the Gulf Coast – has sparked an escalating debate in recent months, ... Authorizes TransCanada Keystone Pipeline, LP to construct, connect, operate, and maintain the pipeline and cross-border facilities specified in an application. The $5.3 billion dollar project describes itself as "the largest infrastructure project currently proposed in the United States." TC Energy's website claims the ... Jun 9, 2021 ... Keystone XL, which was proposed in 2008 to bring oil from Canada's Western tar sands to U.S. refiners, was halted by owner TC Energy Corp (TRP. Jan 30, 2015 ... A tar sands mine near Fort McMurray, Alberta, Canada. The Keystone XL Pipeline would bring crude oil from the tar sands to refineries in Texas. Jun 7, 2019 ... An appeals court has lifted a judge's injunction that blocked construction of the Keystone XL oil pipeline from Canada to the US. Mar 31, 2020 ... TC Energy to Build Keystone XL Pipeline. Construction will lead to thousands of new jobs, billions in economic stimulus and enhanced North American energy ... Jul 1, 2019 ... Conservation groups filed a federal lawsuit today challenging the US Army Corps of Engineers' illegal approval of the Keystone XL tar sands pipeline. Nov 6, 2015 ... The State Department has decided that the Keystone XL Pipeline would not serve the national interest of the United States. Mar 8, 2012 ... President Obama has once again blocked the Keystone XL pipeline today. He personally lobbied Senate Democrats to vote against the project.