From MSNBC:
Poll shows Democratic candidate losing ground to Bush

In virtually every measure tested, Kerry's image has eroded in recent weeks. He has lost his double-digit advantage as the candidate viewed by voters as more honest and more understanding of their problems. The president also is now seen by voters as the candidate who better reflects their values, and he has increased his advantage as better able to keep the country safe and secure. The proportion of voters who rate Kerry as "too liberal" has increased slightly, from 36 percent in June to 40 percent.

On issues, Kerry has also lost ground to Bush. By increasing margins, the president is seen as better able to deal with Iraq, the war on terrorism and taxes. On two key issues in which Kerry had an advantage as late as two weeks ago -- the economy and education -- the candidates are tied.
And,
Four issues topped the agenda when voters were asked what they most wanted Kerry to talk about in his televised speech from the convention on Thursday: the economy and jobs (20 percent), Iraq (19 percent), terrorism (15 percent), and health care (13 percent).
I predict that Kerry will run away from his voting record and his anti-war stance and try to become all things to all people in his speech tonight.