The phrase "argument has shifted" is correct and usable in written English.
It can be used to indicate that the focus or position of a discussion or debate has changed.
Example: "During the debate, it became clear that the argument has shifted from economic concerns to social issues."
Alternatives: "the discussion has changed" or "the focus has moved".
Of late, the argument has shifted a bit in favour of the Balts.
A candidate Scotland would have to negotiate entry terms and commit to join the euro one day.Subtly, the nationalist argument has shifted.
It might seem that the burden of argument has shifted to advocates of reflective equilibrium to show why "initial credibility" should be ascribed to moral judgments or intuitions.
More recently, the argument has shifted away from the difficult project of definitions, to outlining institutional policies and procedures that take a measured and patient-by-patient approach to deciding if an existing or desired intervention is futile.
The prevailing argument in Bonn has shifted.
The greatest shame of the last year, perhaps, is that the argument over interrogations has shifted from debating what is legal to considering what is just "better than before".
Whether or not they buy the reasoning behind it, many readers will think Mr Wolfe's call for active government is now merely pushing at an open door.Faster than anyone expected, the argument among liberals has shifted.
What's also striking for those who have followed its story is how the argument for it has shifted.
What's new is that argument-oriented media has shifted to cable television, something that's happened only in the last decade.
The Clinton argument is that momentum has shifted, their candidate is a fighter and she is in this race to stay.
In recent times the explanation of the fact that sorites arguments come in pairs has shifted from consideration of the sorites series itself and whether it proceeds by addition or subtraction to the predicate involved.
