
Drag in
Conversation Dynamics
 Using 'drag in' can suggest the speaker is irritated about the topic being introduced. 
He always drags in his personal problems, even in professional meetings.
 Unwanted Topics
 'Drag in' often implies the topic is unwanted or disrupts the flow of conversation. 
Let's not drag in our disagreements into the party tonight.
 Subtle Warning
 Can be a polite way to indicate someone is going off-topic without direct confrontation. 
I wish you hadn't dragged in that old argument into our discussion.