McCain, Obama, & lobbyists

http://www.huffingtonpost.com/2008/05/23/mccains-ethical-dilemma-c_n_103216.html

My ultra-conservative Catholic bud tells me that McCain's about to launch an attack on Obama's lobbyists.

Tom Edsall argues at the link that if McCain cut loose all the lobbyists attached to his campaign, his would be a very lonely campaign.

Wouldn't a Rove-style "attack from weakness" on Obama's lobbyist connections be a major risk for McCain, given Obama's recent record of punching back?