Terry Thomas had planned to run for the Beaufort County, South Carolina, School Board.
But Spencer, his 8-month-old Labrador and bull mastiff mix, took a bite out of Thomas' political hopes.
Thomas says he went to check his mailbox and when he returned, Spencer had chewed up his petitions.
Thomas says he had almost 200 signatures.
Now, he won't be able to run in November.
Thomas is a retiree and a substitute teacher.
He tells a local paper, when his students use the old "the dog ate my homework" excuse, he just might believe them.