(AP) – Supporters of a proposed early voting period in Missouri are gathering petition signatures to try to put the issue on the November ballot.

Campaign treasurer Matthew Dameron said Monday that organizers are using volunteers and professional petition circulators to collect signatures of registered voters before the May 4 deadline.

Dameron is a former chief of staff to Missouri Attorney General Chris Koster. He says Koster has provided political advice to the early voting campaign.

The proposed constitutional amendment would let voters cast ballots in person or by mail beginning six weeks before a general election. Current law allows absentee voting only under certain circumstances, such as when people can’t get to the polling place because they will be out of town or are ill or disabled.