Are you this ignorant? The pipeline became well known when the proposed KXL extension attracted opposition from environmentalists with concerns about climate change and fossil fuels. In 2015, KXL was temporarily delayed by President Barack Obama. On January 24, 2017, President Donald Trump took action intended to permit the pipeline's completion. On January 20, 2021, President Joe Biden signed an executive order[19] to revoke the permit[20] that was granted to TC Energy Corporation for the Keystone XL Pipeline (Phase 4). On June 9, 2021, TC Energy abandoned plans for the Keystone XL Pipeline.