at somebody's mercy

My country is at the mercy of such a man.

But he was no longer at the mercy of fear.

Without him, she was at the mercy of whatever found her.

At the mercy of those five others, I would be.

No longer are they at the mercy of public use.

But he often seems at the mercy of the forces around him.

But after she died he had been at their mercy.

Now I have all of you at my mercy, and the city as well!

He could not quite bring himself to say at your mercy.

But at Mercy, five of the seven players are black.