( CNN) From party leaders to the progressive challengers trying to uproot them, there's at least one thing uniting most Democrat ahead of the 2018 midterms: When it comes to Russian election interference, let special advise Robert Mueller's indictments do the talking.

House Minority Leader Nancy Pelosi of California, the speaker's gavel back in her sights, has offered up similar warnings and tried to quell calls from within her ranks for Trump's impeachment. Chuck Schumer of New York, the top Democrat in the Senate, has also sought to steer the party's focus away from President Donald Trump and All Things Russia.

For the most part, Democrats on the front line this fall say they're on board, poised to keep their focus on bread and butter( and soy, at least in the Midwest) questions. But in weeks like this one, it's easy to see how that discipline — and the required balancing act — could fall apart.

Kavanaugh's comments are more than two years old. Situations have changed. The Mueller probe, unlike Ken Starr's( which Kavanaugh worked on) has different stakes. There is no reason to believe Kavanaugh has changed his mind or tilts, and if his breathless paean to Trump on the night of his unveiling is any indication, it's difficult to imagine him backing Mueller — or anyone — over the President.