Check out this headline from the Washington Post:

Remember how the Benghazi probe morphed into the email probe that eventually led to Hillary Clinton’s loss in 2016? This is the same thing. Maybe the Burisma probe will produce something, or maybe it will serendipitously lead to something else that will produce something. Who knows? But it can’t hurt to try, especially after working so well last time.
And this will not be anything close to impartial, either. It will not be farmed out to a professional investigator, as the Russia probe was to Robert Mueller. Nor will it be strictly limited to a single topic so it can be concluded quickly, as the Ukraine probe was. It will be designed to keep going until Election Day and to ferret out anything that might be embarrassing to Joe Biden, whether fair or not. It will also be designed to leak dribs and drabs of unverified dirt to credulous reporters who will claim, after it’s all over, that of course this was all newsworthy and they really didn’t have any choice but to run with it, did they?