Pelosi can only lose about 17 Democrats if she wants to win her speakership.

https://www.bostonglobe.com/news/nation/2018/11/27/moulton-plays-risky-game-his-bid-keep-pelosi-from-regaining-speakership/OVV5jWRDD2RCyeXf6MAOwI/story.html?p1=Article_Recommended_ReadMore_Pos4