Keystone XL, the proposed oil pipeline from Canada to the US that was opposed by environmental campaigners, has been put back on the political and commercial agenda by Donald Trump’s presidential election victory. TransCanada, the company that had been attempting to build the pipeline before it was blocked by the Obama administration last year, said on Wednesday that it remained “fully committed to building Keystone XL”. It added that it was “evaluating ways to engage the new administration” on the benefits of the project, including an estimated 9,000 construction jobs and a $3bn boost to US gross domestic product. The renewed hopes at TransCanada follow repeated statements from Mr Trump that he wanted to see the pipeline go-ahead. He has said that once in office, he would invite TransCanada to resubmit the application to build it that was rejected by President Barack Obama. TransCanada first submitted an application for Keystone XL in 2008 to the US state department, which must approve the project because it crosses the border. After seven years of studies and delays by the administration, Mr Obama rejected the pipeline.