Shifts among core constituencies suggest that President Obama and House Speaker Nancy Pelosi (Calif.) may have reaped some benefit from the legislation’s passage, but the public’s take on the Democratic Party has not budged, and Senate Majority Leader Harry M. Reid (Nev.) appears to be losing popularity. None of the central players in passing health-care reform appears to be winning favor with the bill’s opponents.

Views on Pelosi tilt negative but are closely divided, with 42 percent approving of the way she is handling her job as speaker, and 46 percent disapproving, in line with her ratings in a January Post-ABC News poll. Although her overall rating is stable, the survey finds the speaker gained in strong support among Democrats, liberals and those who support the reform package…

There has been no such bump for the Democrats’ leader in the Senate. Reid’s overall approval rating has ticked downward, from 35 percent in January to 29 percent now, and among Democrats, it has dipped from 57 percent to 45 percent. With Reid facing a stiff challenge in his reelection bid, approval in the Western states — his home region — has dropped to 23 percent. Not all of this decline corresponds with an increase in disapproval, however, as one-quarter of people express no opinion about the majority leader, up from 18 percent in January.