Owning the Issue

Today's Day By Day cartoon, by the excellent Chris Muir, exhibits a characteristic conceit of the Left. Please have a look at it, and at yesterday's cartoon as well, before continuing on here.

What does it mean for a political posture to claim to "own" an issue?

That others of different convictions have nothing valid to say on the matter.
That others of different convictions lack either the acknowledged expertise or the "moral authority" required to speak on the matter.
That debate is over; anything said contrary to the "official" position of the "owner" may be dismissed without analysis or consideration.
All of these things are directly implied by the "ownership" claim. Other things follow as well -- the "differential rectitude" of the "owners," for example -- but for the purposes of this tirade, the three above will suffice.

First, imagine the probable response from the Left were the Right to claim to "own" any of these issues:

National security and military preparedness;
Foreign policy and the maintenance of specific alliances and relationships;
Fairness in taxation;
Effective education;
The proper division of authority among the branches of the federal government;
The proper division of authority between Washington and the state governments;
The Constitution's limitations of the powers of government.