Nike Profit Up on Strong U.S. Demand  SAN FRANCISCO (Reuters) - Nike Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=NKE.N target=/stocks/quickinfo/fullquote"&gt;NKE.N&lt;/A&gt;, the world's  largest athletic shoe company, on Monday reported higher  quarterly profit on strong demand for its namesake products in  the United States.