It would be nice to see them lose in a primary rather than a general.
It may be too late in some states to recruit a primary opponent, but in states that have later filing dates and later primaries, even a token opponent would rattle a few cages.
Anyone with $500.00 can get yard signs printed up with the message,
Good idea. That way we don't have to give up a congressional seat to get them out of power.
In fact, the larger the margin of victory in the general election, the better chance to knock them off, because you can do so in the primary.