They said to him, “Thus says Hezekiah, This day is a day of distress, of rebuke, and of disgrace; children have come to the point of birth, and there is no strength to bring them forth.
The contents of Rabshakeh's speech being brought to Hezekiah, one would have expected (and it is likely Rabshakeh did expect) that he would call a council of war and it would be debated whether it was best to capitulate or no. Before the siege, he had taken counsel with his princes and his mighty men, Ch2 32:3.
Commenting on 2 Kings 19:1-7
And they said unto him, Thus saith Hezekiah, This day [is] a day of trouble, and of rebuke, and blasphemy: for the children are come to the birth, and [there is] not strength to bring forth. (b) The dangers are so great, that we can neither avenge this blasphemy, or help ourselves any more than a woman in labour.
The children are come to the birth - The Jewish state is here represented under the emblem of a woman in travail, who has been so long in the pangs of parturition, that her strength is now entirely exhausted, and her deliverance is hopeless, without a miracle. The image is very fine and highly appropriate.