Lyle Denniston looks at four potentially very significant new challenges under way to Obamacare, including one argument that is growing in popularity with the law’s critics. THE STATEMENTS AT ISSUE: “My jaw dropped when I first saw this. This has the potential to sink Obamacare. It could make the current website problems seem minor by comparison.” – Michael F. Cannon, health policy analyst at the Cato Institute in Washington, discussing a series of lawsuits challenging the Internal Revenue S...