CHEYENNE, Wyo. (AP) — Sen. Mike Enzi and Republican primary challenger Liz Cheney are releasing lists of their key volunteers and supporters.

Cheney on Monday released her leadership teams for all 23 Wyoming counties. That's on top of her statewide leadership crew announced last summer.

Cheney's state and county campaign leaders now number more than 50 people.

Enzi followed up a few hours later with his own state campaign team — a list of some 350 supporters from all 23 counties.

Cheney announced in July she will attempt to unseat Enzi in the state GOP primary next August. Enzi was first elected to the U.S. Senate in 1996 and has served almost three full terms.