"Grim argued in the Post that the old-guard Democrats — led by House Speaker Nancy Pelosi — were buffaloed long ago by The Gipper: by Ronald Reagan’s presidential landslide in 1980 and 1984 reelection. They suffered a “traumatic political coming-of-age” in Reagan’s rise and have never been the same, he argued.
Because of that experience, their consistent fallback position is: “Now is not the time; push too fast or too far, and there’ll be a backlash,” according to Grim.
The old-era Democrats are still now “unable to embrace the new political environment in which the progressive agenda is genuinely popular,” he noted. “For people under a certain age, this slinking in the corner is deeply strange behavior.”
While I'm glad Grim said it I'm not so sure if that's truly what motivates the entrenched party leadership. IMO the leadership's interests are not that different from republicans interests as a whole. They just sell it a different way.