Whether the tragic shooting in Tucson will have any lasting political impact remains to be seen, but so far, it doesn’t seem to have affected the way Americans view President Obama’s job performance.

The latest Gallup poll, reflecting interviews taken after his widely-praised speech at the memorial service last Wednesday, shows that 48 percent of Americans approve of Obama, compared with 42 percent who disapprove. That’s little changed from the survey taken just before the shooting, which showed 48 percent approval and 43 percent disapproval — a statistically insignificant difference.

Sometimes there’s a “rally around the president” effect following national tragedies, but it doesn’t look like that’s happening in the wake of the attempted assassination of Rep. Gabrielle Giffords that killed six and injured a dozen others.