WASHINGTON—Less than a week after the economic gut punch of Keystone XL, Canada is bracing for more bad news from the White House. President Joe Biden is expected to sign an executive order today that would establish a new Buy American regime to ensure U.S. workers and companies reap the benefits of government spending. “Federal law requires government agencies to give preferences to American firms; however, these preferences have not always been implemented consistently or effectively,” the White House said in a release detailing the measures. “It is long overdue that the U.S. government utilizes the full force of current domestic preferences to support America’s workers and businesses, strengthening our economy, workers, and communities across the country.” The plan promises to increase the amount of U.S. content a project would need to qualify as being “made in America,” and to apply more stringent standards to the sort of hard-won exceptions …