Recently there have been a few conservative executives warning their employees that there might be consequences if Obama was reelected. The Koch brothers even sent employees a list of candidates they supported. Illegal? While not strictly illegal it is at least ethically questionable.
Turns out on June 6th, Mitt Romney led a conference call with the National Federation of Independent Business where he suggested that tactic to the bosses in audience. The advice in question begins at 26:00.