Relations between Moscow and Washington could face serious complications after the U.S. election. That's according to an anonymous source in the Russian Foreign Ministry, who was quoted as saying ‘ties could come to naught’.

According to the Interfax news agency, the source was responding to recent comments by U.S. presidential hopeful, Republican John McCain, who called for Russia to be booted out of the G8 and criticised democracy in the country.

“Everything is fine until we're told how we are meant to behave, who to sleep with and who to push out the door,” the diplomat was quoted as saying.

“After all, they are not godfathers of our children, and there are a lot of others to communicate with,” the source said.

Relations between the two countries have been rocky with issues such as the proposed U.S. anti-missile defence system in Eastern Europe often causing diplomatic disputes.