​Texas and Montana are among 21 states suing President Biden for signing an executive order rescinding permits for the Keystone XL pipeline from Canada, arguing the president has overstepped his authority. The lawsuit filed Wednesday in federal district court in Texas argues that because the oil pipeline will pass through several states on its way to refineries in Houston, Congress has the right to regulate ​interstate ​commerce, not the president, and should have final say over whether it will be built.