White House representative Sarah Huckabee Sanders said Friday that is because of dialect in a presidential order Trump issued in January. The order applies to new pipelines or those under repair. Sanders said it is difficult to do a turn around on Keystone since it's as of now under development and the steel has been procured.
Trump said as of late as a week ago that Keystone and the Dakota Access pipeline must utilize American steel "or we're not building one."
Trump utilized his official powers not long after taking office to greenlight the two pipeline extends that had been hindered by President Barack Obama.
The Keystone pipeline would keep running from Canada to refineries in the Gulf Coast. The Dakota Access line would move North Dakota oil to Illinois, and that venture is about entire.