The White House on Friday pushed back against a GOP effort to tie Supreme Court nominee Sonia Sotomayor to the work of a Puerto Rican legal advocacy group.

Senate Republicans have been pressing the group, LatinoJustice PRLDEF, to provide records from 1980 to 1992, when Sotomayor served on the organization’s board of directors.

White House counsel Gregory Craig told Jeff Sessions of Alabama, the top Republican on the Senate Judiciary Committee, that Sotomayor has already provided the committee with all relevant documents related to her involvement with the group.

In a letter, Craig said Republicans are seeking documents “that were not written, edited, reviewed or approved by Judge Sotomayor.”

He added that “the documents you are now seeking are not relevant to her nomination.”

Republicans have sharpened their focus on Sotomayor’s involvement with the group, then known as the Puerto Rican Legal Defense and Education Fund.

“PRLDEF has reviewed only three of more than 300 boxes of materials, and from that we have received only 300 pages of documents. This is unacceptable,” Sessions said. “Rather than simply defend PRLDEF, the White House should respect the Judiciary Committee’s important bipartisan request that these documents be delivered to the committee in a timely manner so they can be reviewed before Judge Sotomayor’s hearing.”

The group turned over an initial batch of documents to the committee June 30 and is expected to provide additional documents in the coming days. Republicans are looking for material to use to paint Sotomayor as ideologically radical.

A spokesman for Sessions on Wednesday called the documents already provided the “tip of the iceberg” and hinted that Republicans might seek to delay Sotomayor’s July 13 confirmation hearing if they are not satisfied the group has turned over enough documents.

Sessions wrote Sotomayor on June 26 asking for more information about her involvement with the group. He also asked her about the circumstances under which “representatives” of Sotomayor searched the group’s archives.

Craig told Sessions that Leslie Kiernan, an attorney with the Washington law firm of Zuckerman Spaeder, led a team of “private citizens under contract with the White House” in searching the group’s archives.

Craig also pointed out that Sotomayor’s involvement with the group ended before the Senate confirmed her in 1992 to a district court judgeship and in 1998 to her seat on the U.S. Court of Appeals for the 2nd Circuit.

“Perhaps there is confusion about Judge Sotomayor’s role with PRLDEF, and that confusion may account for your unusual interest,” Craig wrote, adding, “Judge Sotomayor was never an employee of PRLDEF nor did she ever supervise the work of PRLDEF staff.”