Join Date: Aug 2015
Posts: 5,678
Straddling BU under normal circumstances is bad. Some people think it's good at some tables, but I don't agree with their reasoning. Putting money in blind is very hard to overcome, and the BU is already hugely +EV without straddling. Straddling is just losing money (relative to not straddling).
I think straddling BU here is good. CO straddle is such a huge hit to your BU EV that I think re-taking position is worth it, especially if it makes CO stop straddling. I'm not sure why CO would stop straddling, though. It's +EV for him to see you re-straddle.