In a reversal of roles, Republicans are now complaining that Democrats are stalling on an investigation into intelligence during the buildup to the Iraq War.

Senate Intelligence Chairman John D. Rockefeller IV, D-W.Va., made completion of the “Phase II” investigation a top priority after Democrats took control of the committee in January. He said earlier this year that he wanted to finish by summer.

But since then, the panel has completed work on only one of the three outstanding reports. In May, it released a study of ­prewar forecasts of what postwar Iraq would look like. The two remaining are the same controversial reports that bedeviled Republicans — one examining the role of the Pentagon’s Office of Special Plans and the other contrasting the statements of public officials with what the intelligence community was saying at the time.

The Phase II investigation began at the urging of Democrats in 2004, after the panel wrapped up the first phase, which Democrats had argued focused on the CIA’s failings to the exclusion of other players, such as the Pentagon.

As time wore on, though, Democrats accused Republicans of delaying the investigation to protect the Bush administration. Republicans countered that Democrats were trying to use the investigation for political gain.

The fight became so heated that in November 2005, Democrats forced the Senate into a closed session to pressure Republicans into moving forward, prompting nasty exchanges between the two parties.

Rockefeller said last week that the investigation is “chugging along very nicely,” but quietly, “without pyrotechnics,” a reference to the fights of recent years.

Not so, said Christopher S. Bond of Missouri, the top Republican on the Intelligence panel. “They haven’t scheduled any time on it,” he said.

“I don’t think they’re that hot on it,” Bond said, charging that Democratic complaints from recent years amounted to “games.” Now, he said, “I want to get it done and over with.”

During the 109th Congress, Democrats centered many of their complaints about Phase II on Republican Pat Roberts of Kansas, who chaired the Intelligence Committee at the time.

Asked last week for his reaction to the fact that the investigation wasn’t finished, Roberts said, “I don’t think very much of it.”

Under Roberts, the committee released two reports in the Phase II investigation in August 2006 — one examining erroneous claims of Iraq’s ties to al Qaeda and its possession of weapons of mass destruction, and another examining the influence on the administration of the Iraqi National Congress, a dissident group led by Ahmed Chalabi.

“Then, it was a cause célèbre,” Roberts said. “A year later, it doesn’t matter.”

Ron Wyden of Oregon, a Democratic member of the Intelligence panel, disputed Roberts’ charge. Wyden said he “absolutely” wanted to see the investigation completed.

But Wyden said other subjects, such as legislation making changes to the Foreign Intelligence Surveillance Act (FISA, PL 95-511) have consumed the panel.

“We’ve got a lot of stuff piling up,” he said. “Right now it’s a queue. And FISA is first up in the queue.”

The committee approved legislation Oct. 18 that would permit warrantless surveillance of international calls that may involve U.S. citizens, while granting a special court authority to review several aspects of such spying. The measure is also expected to be marked up by the Senate Judiciary Committee in coming weeks.

Still, another Intelligence panel Democrat, Dianne Feinstein of California, said the status of the Phase II investigation was a “good question.”

Feinstein said she has not “been at a meeting where it’s come up. But I can’t make every meeting.”

Committee spokeswoman Wendy Morigi said work on Phase II has been “ongoing,” and it is still on the agenda.

“Over the next few months, the committee will work towards completion of the final, remaining two reports,” Morigi said. “Sen. Rockefeller is absolutely committed to finishing Phase II so that the American public have a full accounting of how intelligence was used to justify the war.”