Mainers for Responsible Gun Ownership

The campaign seeking to strengthen background checks for gun sales has already spent $1.5 million this year to try to win support from Maine voters. The group, Mainers for Responsible Gun Ownership, is expected to meet stiff opposition from gun rights activists before the ballot campaign is over.

The pro-background-check campaign has pulled in close to $3 million after two political action committees merged earlier this year. And more than half of the newly reported $2.1 million in contributions has been spent on significant campaign operations.