Ald. Felix Cardona (31) switched on the ward map proposal he supports. [City of Chicago; Frank Calabrese]

The remap group including a supermajority of Chicago aldermen claimed Northwest Side Ald. Felix Cardona (31) on Thursday as a new crossover member of its coalition — but supporters of the competing map say the reality is more complicated, and the alderman in the middle is keeping quiet amid the confusion. The chaotic episode added a fresh hurdle to emerging negotiations this week over a potential compromise between the two competing maps.