Do you think Dems should turn their attention away from Bush and more towards the Republican candidates?

Well, the Bush bashing is making them popular. It's a tactic to draw the attention of Bush haters and gain votes. That's pretty obvious. They will refer to Bush's mistakes and tell the people how much better they will be if they become president. I agree, they should also focus on the Republican candidates as well. I recommend they start with Giuliani. He is an easy target.