File: Former Vice President Dick Ceney (AP)

Former Vice President Dick Cheney on Sunday accused Sen. Mike Enzi (R-Wyo.) of lying about the two of them being fishing buddies.

Cheney's daughter, Liz Cheney, is challenging Enzi in a primary next year -- a race that has forced big-name Wyoming politicians to choose between one of the state's first families of politics and an incumbent senator.