She wrote a column in the Washington Post on the issue of whether Tara Reade was telling the truth about Joe Biden (Reade alleges sexual assault).
Marcus actually acknowledges the problem of hypocrisy in her column.
"...Outrage over misbehavior only by those with whom we have ideological differences is not righteous — it is hypocritical. Skepticism about accusations only when they are made against someone with whom we are ideologically aligned is not high-minded — it is intellectually dishonest...."
I would give her more credit for this if her analysis of Reade's accusations were more objective e.g., Marcus says that too much time has passed for an investigation of Reade's accusations (about an event that allegedly took place in 1993) but also contends that Blasey Ford's accusations (about an event that allegedly took place in about 1982) were not investigated enough.
Notwithstanding that, at least Marcus does admit there is a potential issue which is more than many.
Rose McGowen, one of the founders of the "MeToo", had some nasty words for the Washington Post in this tweet. I don't think it was about the Marcus opinion but about a news article that downplayed the Reade accusation.