u/Iplaywithtrains235

I’m a Director with about 25 associates and two supervisors that I manage as well as some system level responsibilities. I found out on Friday that two other Directors have convinced a newly appointed executive leader that they can do my work better and should have about a third of my staff shift to their area and report to them instead of to me. This would shift the function of this whole team out of my area and over to a different entity in the organization.
These Directors are people that I have worked collaboratively with for a couple years but they have recently begun using “gotcha” questions and trying to get me to talk down about my own executive leader. It seems like they are enacting a power-play to bring span of control out of the entity that I report through and into their own.
As a new-ish manager/director, three years / two years respectively, I am not great with playing internal politics. So I’m wondering what my play is here. Do I confront them directly? Do I go talk with their executive leader?
I’m sure they have made a case that I should have a better strategy or should be running things differently. The thing is, I would be happy to make changes if we could sit down and have a conversation about it to meet their needs, but I was never given that opportunity. Is there a way to facilitate a collaborative conversation here?