From the press release on the hearing request:
The NLRB’s own data confirm that over a longer span of time—the last 20 years—the annual representation caseload has dropped by 59 percent, the number of representation cases the Board decided has dropped by 72 percent, the number of unfair labor practice cases has dropped by 33 percent, the number of unfair labor practice cases the Board decided has dropped by 63 percent, the number of elections held has dropped by 57 percent (although the union win rate has increased), yet during the same period funding has increased more than 70 percent. The letter was sent by Alexander along with Senators Jerry Moran (R-Kan.), Richard Shelby (R-Ala.), Thad Cochran (R-Miss.), Lindsey Graham (R-S.C.), Mark Kirk (R-Ill.), Mike Johanns (R-Neb.), John Boozman (R-Ark.)., Mike Enzi (R-Wyo.), Johnny Isakson (R-Ga.), Richard Burr (R-N.C.), Orrin Hatch (R-Utah), Pat Roberts (R-Kan.), and Tim Scott (R-S.C.).