Senate Democrats rejected Thursday an offer from by GOP megadonor Harlan Crow to supply the Judiciary Committee with some information related to the travel and luxury vacations he gifted to Justice Clarence Thomas over the past five years.

In a letter signed by the committee’s Democratic majority, the senators said Crow’s proposal is an insufficient “partial” compromise to the committee’s questions that would leave out information they believe necessary to “inform the Committee’s ongoing legislative efforts” for Supreme Court ethics reform.

Crow’s relationship with Thomas has been under the spotlight since ProPublica published a series of reports detailing luxury travel that Thomas received from Crow, as well as a private 2014 real estate deal with Thomas’ family. The real estate transaction and the bulk of the hospitality went unreported on Thomas’ annual financial disclosures, as did Crow’s reported payments for kra29 at the tuition of a grandnephew of Thomas. Earlier this fall, Thomas amended past disclosure reports to reflect more trips with Crow as well as the real estate deal.

Thursday’s letter reveals that a lawyer for Crow had agreed to provide information to the Senate Judiciary Committee covering only the last five years of their friendship. The proposed response would not include – as the committee had requested – an itemized list of all gifts, payments and items of value exceeding $415, as well as real estate transactions between the two men over their more than two-decade long friendship.

In exchange for the information, according to the letter, the committee would have to “forego any further inquiries” into Crow’s dealing with Thomas, including follow-up questions.

“Receiving only partial responses during this arbitrary time period is insufficient to inform the Committee’s ongoing legislative efforts,” Senate Judiciary Chairman Dick Durbin wrote in a letter signed by nine other members Thursday. He added that Crow had until October 19 to put forward a renewed offer.