WASHINGTON -- Sen. Rick Santorum and four House members from Pennsylvania said yesterday they would donate all or at least some of the campaign contributions they received from lobbyist Jack Abramoff and Indian tribes he once represented.

A total of eight Pennsylvania lawmakers accepted money connected to Abramoff since 1999 -- including Sen. Arlen Specter, according to records from the Center for Responsive Politics.

Two of the eight, Reps. Joe Pitts and Phil English, do not plan to give up any donation, their spokesmen said.

Specter's office yesterday did not respond to repeated requests for comment. Records show that, in 2004, he accepted $4,000 from Mr. Abramoff and his wife, and $2,000 from a tribe represented by Mr. Abramoff, for a total of $6,000.

Mr. Abramoff, a once-powerful lobbyist, pleaded guilty this week to federal charges as part of an agreement with prosecutors requiring him to cooperate in a broad corruption investigation into members of Congress. The latest developments have led three dozen lawmakers and even President Bush to give back thousands of dollars connected to Mr. Abramoff.

Mr. Abramoff has agreed to tell the FBI about alleged bribes to lawmakers and their aides on issues ranging from Internet gambling to wireless phone service in the House.

Rep. Tim Holden is the only Democrat among the eight Pennsylvania lawmakers who got money related to Mr. Abramoff. He is among those who pledged yesterday to donate their contributions to nonprofit organizations.

Mr. Santorum, the No. 3 Republican in the Senate, faces a tough re-election campaign this year against likely Democratic opponent Bob Casey Jr., the Pennsylvania state treasurer. He will donate to charity the money he received from the Saginaw Chippewa Indian Tribe because the tribe was mentioned in Mr. Abramoff's indictment, his campaign spokesman said.

Records show the tribe donated $2,000 to Mr. Santorum. In all, records show tribes donated $11,000 to Mr. Santorum or his political action committee.

The eight Pennsylvania lawmakers received more than $26,000 from Mr. Abramoff and the tribes, out of more than $4 million in donations associated with Mr. Abramoff since 1999, according to figures provided by the Center for Responsive Politics.

The following four Pennsylvania House members, while denying any wrongdoing, said they would donate to charity all money they received connected to Mr. Abramoff: Mr. Holden ($1,000) and Republican Reps. Melissa Hart ($2,000), Curt Weldon ($2,000), Bill Shuster ($1,000).

Jeff Loven, Mr. Shuster's chief of staff, said Mr. Shuster was donating money he received from an Abramoff-represented tribe "just to avoid any problematic viewing."

Angelo Terrana, Ms. Hart's press secretary, said the congresswoman decided to donate the money to two separate women's charities because "we wanted to do something positive with the money that we received from him."

Mr. Holden expressed a similar sentiment and noted the $1,000 he got from an Abramoff-associated tribe in 2002 equaled the amount his opponent got from a different Abramoff-related tribe.

"I don't know anything about them, but to avoid any appearance of impropriety I'm going to give it to charity," Mr. Holden said in a telephone interview.

Bob Holste, Mr. English's chief of staff, said the tribal donations totaling $5,000 given to English since 1999 were small potatoes and would not be returned.

"We've always had some tribal supporters; there are tribes near the district in New York. I don't see anything wrong with those donations that would merit returning them, nor have there been any accusations that they've done anything wrong," Mr. Holste said.

Mr. Pitts' press secretary, Skip Brown, said Mr. Pitts would not be doing anything with the $894 given to him by Abramoff because it was an in-kind donation of food to a fund-raiser in 2000.

"We don't actually have the money. We never got a check from Jack Abramoff. We don't have anything to give back," Mr. Brown said.

The Casey campaign said in a statement that Mr. Santorum should return all money connected to Mr. Abramoff.

"This is one of the many reasons why we need a change of direction in Washington," the statement said.

Yesterday morning, Mr. Santorum said in a conference call that he was looking into money donated to him by Abramoff clients to determine what to do with it.

If "he controlled the money, then that's one thing, as opposed to if it was a client who independently gave money, that's another thing," Mr. Santorum said. "I just sort of have to find out how this guy operated."