FREEPORT — The Maine Republican Liberty Caucus says GOP presidential candidate Gary Johnson will be the guest speaker at its annual Calvin Coolidge Clambake fundraiser.

The group says Johnson, the former governor of New Mexico, will speak at the Aug. 26 event at Wolfe’s Neck State Park in Freeport.

The caucus describes itself as a volunteer grass-roots wing of the Republican party that favors small government and individual liberties.

Caucus officials say they have not endorsed a presidential candidate, but have offered a forum at its events for candidates.