entre le marteau et l'enclume

Adverb

 * 1)  between the hammer and the anvil
 * 2)  between a rock and a hard place; between the devil and the deep blue sea

Usage notes
In the idiomatic sense loosely identical to “be in a bad situation”; not as strong as and it doesn't catch the idea of being forced to take into account antagonist interests (the “hammer” and the “anvil”). When a decision is hard to make between one or the opposite one, neither of them being ideal.