You’re on, guys!
“Running for president in the YouTube era, you realize you have to be very judicious in what you say. You have to be careful with your humor. You have to recognize that anytime you’re running for the presidency of the United States, you’re on.”
– Mitt Romney, …quoted by the New York Times, in June 16, 2007.
Of course, when you have secret fundraisers with the wealthy you may not consider yourself “on.” It’s when you are put there against your knowledge that you should realize that there is no time when you aren’t “on.”
As to being judicious in what he says, we haven’t seen that level of control yet. What this portends for the debates is anyone’s guess.