Maine lawmakers who unsuccessfully tried to ban corporations owned or influenced by foreign governments from spending in state referendums filed on Wednesday to put their effort on the 2022 ballot.

It marks the fifth referendum effort targeting Central Maine Power Co. since last year and comes as an outgrowth of the political fight over its $1 billion corridor that would bring Quebec hydropower to the regional grid through western Maine. Voters will consider an anti-corridor referendum in November 2021 after Maine’s high court struck one from last year’s ballot.

Proponents now want voters to pass a bill vetoed this year by Gov. Janet Mills that would have prohibited companies with foreign government ownership from spending on referendum efforts in Maine. The proposed law would be…