Portland Mayor Michael Brennan and two city councilors are calling for a citywide minimum wage of $10.10 an hour, $2.60 above the state minimum and more than $1 more than a City Council Finance Committee proposal scheduled for a vote Monday. The more aggressive proposal comes days after Portland certified a citizen petition that will likely lead to a citywide referendum in November asking voters to approve a $15 hourly minimum, one of the highest in the nation. Councilor Jon Hinck said in an email that he, along with Brennan and Councilor Justin Costa, will push for an amendment at Monday’s council meeting to establish a minimum wage of $10.10 an hour starting Jan.