It doesn't matter if he was talking about their mandate or not, he was talking about removing the right of a party to be in power for more than one or two terms, which is a ludicrous point to raise when we don't vote parties into power, only local politicans who are then free to form associations- that parties come to power as a result of that is not a direct result of the poll. Moan about whips all you like, it changes nothing. I'm not talking of theory, merely the sheer and unquestionable practicality of the matter. It's not like barring a President from a third term, not at all.
The entire thrust of his point is, basically, irrelevant. You cannot stop people voting for local representatives, and the majority of the party mechanic isn't even voted for. So that pretty much ends the matter.