Michelle lobbying against Hillary VP possibility

According to political insider Robert Novak, Michelle Obama, the possible future First Lady, does not want Hillary Clinton to be chosen as Barack's runningmate:

Close-in supporters of Sen. Barack Obama's presidential campaign are convinced he never will offer the vice presidential nomination to Sen. Hillary Clinton for one overriding reason: Michelle Obama.

The Democratic front-runner's wife did not comment on other rival candidates for the party's nomination, but she has been sniping at Clinton since last summer. According to Obama sources, those public utterances do not reveal the extent of her hostility.

We have known for quite some time that Michelle is not fond of the Clintons.  For example, the incident last January: