How to get out of a hole? Step 1. Stop digging.
The Democrats have dug themselves into a deep hole with the latest impeachment attempt. More digging will continue to depress the ratings of their own Presidential debates.
It can also help pave the way for the Republicans to take back the House. Continued digging like this also gives Trump a clear path to Electoral College victory in 2020. Swing state voters and Independents are not being convinced by the Ukrainian propaganda campaign. They are tired of the endless litigation.
The Democrats have issued lots of subpoenas. That may be very popular with partisans but it isn’t exciting too many moderates or working class people. So, by all means, make impeachment the be-all and end-all of the Democrat Party. A party too stupid to stop digging deserves to be buried in a hole of its own making.