John McCain's main foreign policy adviser, Randy Scheuneman, was (and maybe is) a paid lobbyist for the nation of Georgia. Did McCain get paid for promoting Georgia? Did he get special access to the President Saakashvili because of the lobbyists on his campaign staff? During one of the many visits and phone calls that he has touted on the campaign trail, did he encourage Saakashvili to invade South Ossetia, resulting in many deaths, as described in today's NYT by Mikail Gorbachev.
McCain probably didn't do anything unethical regarding Georgia to promote his campaign, but having a lobbyist for Georgia on his staff certainly raises ethical questions. It certainly gave him better access to Saakashvili than Obama had, if only because of Scheuneman's rolodex.