AUSTIN -- The chairman of the University of Texas System Board of Regents is fighting disclosure of records to state lawmakers who are investigating the board's dealings with the Austin flagship.The board chairman, Gene Powell, asked state Attorney General Greg Abbott to decide whether the UT System must provide all of the requested records.Revealing some of the materials could affect the system's ability to conduct an investigation, abrogate its attorney-client privilege or otherwise "intrude and unduly interfere" with certain duties, Powell wrote in the letter.State Sen. Kel Seliger, chairman of the Senate Higher Education Committee and co-chairman of a special House-Senate oversight panel on higher-education governance, said he would ask Abbott for an expedited ruling."These are people who went on a huge document-mining expedition in the name of transparency and now wish to withhold documents from a legislative committee," said Seliger, R-Amarillo. "Who do these guys think they are?"Many lawmakers have been critical of the UT board for what they consider micromanagement of the Austin campus and efforts to oust its president, Bill Powers. The House-Senate panel established to look into the matter requested voluminous records.