AUGUSTA, Maine — Legislation prompted by the political activities of Maine’s three constitutional officers has been rejected by the state Senate.

By a 21-12 vote Wednesday, senators rejected a proposal calling for a bill that spells out what personal political activities should be allowed and barred by the three state constitutional officers.

The proposal is prompted by the entry of all three of those Republican officials — Secretary of State Charlie Summers, Attorney General William Schneider and Treasurer Bruce Poliquin — in the race for Olympia Snowe’s U.S. Senate seat. There are six GOP candidates in all.

Democratic supporters say the public should know that the candidates are not politicking for elective office on work time.

But opponents said the proposal itself is fueled by partisan politics.