I think Ayers and Wright are both fair game–the latter more than the former. But the attack that is most relevant to an Obama presidency concerns his ties to Nancy Pelosi and Harry Reid. Would he be a rubber-stamp for his party’s liberalism? There is plenty of evidence to suggest that the answer is yes. McCain can credibly say that he will work with them when appropriate but block them from raising taxes, socializing health care, funding abortion, and weakening national security. The Democrats have used every opportunity to run against Bush even though he is not on the ballot. McCain has refrained from running against Congress even though it is–and is even less popular than Bush.