Still, this could all work out fine. They could discredit the FBI and maybe even trigger a dismantling of it.
Fine for who? Dismantle the agencies that are entrusted to make sure a government operates within the law, coupled with a Congress which thinks that is a good idea.
When Putin came to power, Russian presidential elections every four years with a two term limit. Then they went to every six years with a two term limit. Now Putin is running for a 3rd term. Next it will be president for life. How do you think these things happen?