Reuters - The Obama administration on Tuesday appealed a judge's ruling in Florida that struck down its landmark healthcare overhaul law as unconstitutional because it required Americans to buy healthcare insurance or face a penalty.<p><strong>Read more:</strong> <a class="rssreadon" rel="external" title="Obama administration appeals healthcare ruling   (Reuters)" href="http://us.rd.yahoo.com/dailynews/rss/topstories/*http%3A//news.yahoo.com/s/nm/20110309/pl_nm/us_usa_healthcare_appeal" target="_blank">http://us.rd.yahoo.com/dailynews/rss/topstories/*http%3A//news.yahoo.com/s/nm/20110309/pl_nm/us_usa_healthcare_appeal</a></p>