Is the mint killing the rhubarb?

[GoingLoopy]

I've planted mint quite close to my rhubarb and the rhubarb hasn't been doing well for quite some time now. Could the mint be killing it? Should I move the mint?

I didn't think you could kill rhubarb. I had some that I was trying to get rid of. dug it out year after year and it just came back. This year it came up from under a paving slab and I've now decided I like to eat it. Maybe it will die to serve me right.
I've never heard of mint killing anything although it does spread a lot and it would be easy to move.