Mainers are heading to the polls Tuesday to select a candidate in the race for the Democratic Presidential Nomination.

Maine is one of 14 states that holds its Democratic Primary on Super Tuesday. Residents of Massachusetts and Vermont are voting Tuesday as well.

Maine’s top election official said turnout in Maine’s primary election is heavier than expected. Secretary of State Matthew Dunlap said he’d projected turnout of 15 percent Tuesday. But he said that it appears that turnout will surpass that projection.

There are a dozen candidates on the Democratic ballot but half of them have dropped out. On the GOP ballot, the only candidate is Republican President Donald Trump.

Maine last used primaries in 1996 and 2000 and then switched to the caucus system for the next four presidential election cycles. The return to primaries, made through a legislative change, means turnout is likely to be much higher than previous contests.

The state will also decide whether to overturn a law that eliminates non-medical vaccine opt-outs for schoolchildren.

The law is scheduled to go into effect next year, and removes religious and philosophical exemptions for state-mandated vaccines.

Similar laws have been approved in New York and Washington state.

Opponents of the law call it government overreach, while supporters say eliminating the opt-outs will help keep preventable diseases at bay by curbing the growing rate of unvaccinated children.

Reminder: Newsradio WGAN will have live and local Super Tuesday coverage from 8-11 p.m.