Analysis: The antiwar Republican congressman from Texas poses a serious threat to Hillary Clinton and potential Democratic rivals in the general election. The presidential race has to a great extent turned into a two issue campaign, immigration and the war in Iraq. Democratic candidates are capitalizing on popular antiwar sentiments among the public but are swimming up stream by apparently supporting President Bush’s policy of turning a blind eye toward illegal immigration and unsecured borders. Republicans running for president, unless sentiments change, are generally positioned against public opinion with their support for the war, however, they are riding the tide...