He feels the author's "failure to challenge questionable assumptions about the prospects for peace is deeply regrettable.
That is a radical and deeply regrettable change at the core of the American value system.
It is deeply regrettable that the last government did not take the evidence on board.
The incident was deeply regrettable, unacceptable on every level and I hope and expect to never witness anything like it again.
The Japanese said they found the move "deeply regrettable" but stepped back from earlier threats to retaliate.
I therefore find it deeply regrettable that Amendment No 13, which calls attention to this fact, was not adopted.
I note that these issues have disappeared from the debate and I find that deeply regrettable.
However, I fear that they want to vote down this paragraph, which I feel would be deeply regrettable.
As such, the approach taken by the British authorities throughout this has been deeply regrettable.
But earlier this week, a spokesman said that his protest was "deeply regrettable."