In a statement, Barrasso says as chairman he will focus on measures that will remove red-tape and bureaucratic barriers to economic development, while ensuring clean air, land and water.
Greene says after three weeks of phone calls and email requests, Micheli called on Thursday to say Cheney would not be participating in the one-on-one debates.
Liz Cheney, the eldest daughter of former vice-president Dick Cheney, is running for Wyoming's only congressional seat, and she was in Casper on Thursday.