<p>The Obama administration and its health-law allies are gearing up this summer to slice through three years of confusion and opposition to Obamacare.</p><p>They've got their work cut out for them. Continue Reading Obama remarks on health care</p><p>Obamacare won't have a shot at success unless millions of people sign up for insurance the healthy as well as the sick. For that to happen, the White House and its allies will need to make the case that coverage is worth it for the estimated 50 million people who haven't been able to afford or access insurance. Supporters are planning to spend tens of millions of dollars to persuade people to get covered under new health insurance options and explain how to sign up.</p><p>(PHOTOS: 10 alarmist quotes on health law ruling)</p><p><a href="http://www.politico.com/story/2013/06/obamacare-challenges-93595.html">Keep reading...</a></p>