 overcome   (Reuters)" border="0"&gt;

Reuters - Republican voters looking for their party's 2012 challenger to President Barack Obama will choose from a field that has as many perceived weaknesses as strengths.<br style="clear: both;" /><p><strong>Read more:</strong> <a class="rssreadon" rel="external" title="Republican 2012 candidates have doubts to overcome   (Reuters)" href="http://us.rd.yahoo.com/dailynews/rss/topstories/*http%3A//news.yahoo.com/s/nm/20110308/pl_nm/us_usa_campaign_republicans_doubts" target="_blank">http://us.rd.yahoo.com/dailynews/rss/topstories/*http%3A//news.yahoo.com/s/nm/20110308/pl_nm/us_usa_campaign_republicans_doubts</a></p>