President Donald Trump is about to make good on his promise to approve the Keystone XL oil pipeline — but the fight is far from over. Instead, it shifts to courtrooms, a Nebraska agency and congressional town hall meetings, where environmental activists and landowners have plotted ways to keep blocking the pipeline TransCanada Corp. has been trying to build for more than eight years. Just winning Nebraska regulators’ approval for Keystone XL’s route through the state could take TransCanada another six months. “A federal approval of the permit is not the end of the line for this project; there’s still many obstacles,” said Anthony Swift, an attorney with the Natural Resources Defense Council that opposes Keystone. “There’s legal challenges, there’s the Nebraska issues and, frankly, there are the economic and market obstacles.” The State Department will issue a permit for the project within days, according to people familiar with […]