In Cleveland, Ohio Democrats Barack Obama and Hillary Clinton zeroed in on each other and the economy, with special focus on the North American Free Trade Agreement, but differences over healthcare got more time than anything else. Did Clinton do what she needed to stop Obama’s momentum? Does either one really want to re-negotiate NAFTA? One Houston paper says Obama has already won in Texas, with a week still to go. But a new, national poll says, that either one will have a tough time against John McCain in November, showing their Republican rival with an edge in experience and the war on terror, even on the economy. Although a majority said the war in Iraq was not worth waging, half said McCain was best equipped to deal with it.