Keystone is just one issue of licensing energy infrastructure. In reality it is more symbolic than substantial.
Obama can fold on Keystone and it would change very little. The real problem is the power of the regulatory bureaucracy and their collusion with business interests intent on limiting competition or obtaining federal funding, or making money indirectly through the regulatory process - the mass of “consulting” firms.
There are 1000x more blocked infrastructure projects or imminent opportunities for them than Keystone.