Sens. Patrick Leahy and Thom Tillis have fired a broadside at U.S. District Judge Alan Albright of Texas, asking Chief Justice John Roberts Jr. to help curb the explosion of patent infringement litigation in his courtroom.

The senators, who are the chairman and ranking member, respectively, of the Senate Judiciary Committee’s intellectual property subcommittee, are accusing Albright of using his status as the only judge in the Western District of Texas’ Waco division to attract patent cases, then improperly refusing to transfer them to more convenient judicial districts.