McCain apparently thinks so too:
John McCain's campaign weighed in as well. “Earlier this week Governor Palin accepted an invitation to join Hillary Clinton in speaking to a nonpartisan rally organized by groups dedicated to halting Iran's nuclear program. Senator Clinton has since withdrawn from the engagement, presumably at the behest of the Obama campaign, and according to news reports Senator Obama's campaign may be leaning on organizers to disinvite Governor Palin as well lest the rally appear partisan," spokesman Michael Goldfarb said in a statement.
"This issue is too important to fall victim to partisan politics. Instead of pressuring Senator Clinton to withdraw and pressuring the event's organizers to disinvite Governor Palin, we hope Senator Obama will consider lending his own voice to this cause."
This would be the perfect chance for NObama to demonstrate his bipartisanship.
"The word is that the organizers of the Rally faced some pretty hard pressure from the Obama Camp. The DNC made some crystal clear phone calls to the event organizers saying that they are taking names and will kick ass on this one. If Obama wins, there will be retribution for anyone (or organization) that does not tow the line and get Palin thrown off the invite list."