On the line and Sitting duck

Sitting duck and on the line are semantically related. in vulnerable topic. In some cases you can use "Sitting duck" instead an adjective phrase "On the line", when it comes to topics like open to attack.

Sitting duck noun - A person or thing that is the object of abuse, criticism, or ridicule.

On the line and sitting duck are semantically related. Sometimes you can use "On the line" instead an adjective phrase "Sitting duck".