For some reason, real investigations make them very nervous. Via Axios:
Congressional Republicans are getting ready for hell. Axios has obtained a spreadsheet that’s circulated through Republican circles on and off Capitol Hill — including at least one leadership office — that meticulously previews the investigations Democrats will likely launch if they flip the House.
Why this matters: Publicly, House Republicans are putting on a brave face about the midterms. But privately, they are scrambling to prepare for the worst. This document, which catalogs requests Democrats have already made, is part of that effort.
[…] The bottom line: Thanks to their control of Congress, Republicans have blocked most of the Democrats’ investigative requests. But if the House flips, the GOP loses its power to stymie. Lawyers close to the White House tell me the Trump administration is nowhere near prepared for the investigatory onslaught that awaits them, and they consider it among the greatest threats to his presidency.

The first investigation that should be conducted when the Democrats take control of the House is the impeachment of Trump.
(Assuming that the Democrats vote early, in the primaries, and often, on November 6.)
Every pollster and Democratic politician knows full well that Trump is the number one issue on the minds of Democratic voters.
Yet, elected Democrats and their leaders refuse to talk about impeachment in a serious way.
They claim that they don’t talk about the topic because it’ll enrage Trumps base who will then flood to the polls in large numbers.
What nonsense.
It’s time for a change in leadership at the top of the party.