Sen. Michael Enzi, R-Wyo., is slated to become chairman of the Committee on Health Education, Labor and Pensions. The former chairman, Sen. Judd Gregg, R-N.H., will now head the Senate Budget Committee, according to a list of tentative assignments subject to Republican Conference approval. Sens. Charles Grassley, R-Iowa, chairman of the Senate Finance Committee, and Richard Shelby, R-Ala., chairman of the Senate Banking Committee, will keep their current assignments. On the Finance Committee, Sen. Michael Crapo, R-Idaho, will fill the vacancy created by Oklahoma Sen. Don Nickles' retirement. Democratic seat assignments for the key tax and finance committees have not yet been announced.