Honestly I don't think so. You can write a statute in a way that is at least partially enforceable and that may be enough. We already have functional laws again

Honestly I don't think so. You can write a statute in a way that is at least partially enforceable and that may be enough. We already have functional laws against perjury that have a higher standard than simply saying something wrong. All you'd have do is make all statements at political debate sessions subject to perjury. The lie would have to be proven to be both intentional and material. I would imagine every decent politician would be safe.