Nicholas Day, the only Democrat running for tax commissioner, is campaigning on a platform of one thing only - to secure a homestead tax exemption for all seniors, regardless of income. Day, who ran unsuccessfully for tax commissioner in 2000, says he sees the position as a plank from which he will speak out and lobby for the homestead exemption on school property taxes for all residents over the age of 65. "Basically, I decided to run for one reason, that's to get the exemption from school taxes for senior citizens," said Day who is a retired information systems manager.