Obamacare architect Jonathan Gruber – who has been making headlines this week after a video surfaced of him admitting the law was meant to take advantage of the “stupidity of the American voter” – acknowledged that the administration knew U.S. workers would lose their job-based health insurance when President Obama’s signature legislation took effect. “If you like your health-care plan, you can keep it,” Obama said numerous times when pitching the new law. But by fall 2013, more than 4 million Americans were getting cancellation letters in their mailboxes. As it turns out, Gruber, also an MIT economics professor, apparently...