"Look, taking on an incumbent mayor who has capacity to raise unlimited amounts of money, and in the third-largest city in the country, given the number of crises we have, is a very serious matter," Lightfoot said while talking to reporters outside an April City Club of Chicago lunch. "And I'm hearing from lots of folks across the city, and frankly, across the country, who are very encouraging. But this is a decision that has to be made by me and my family, because we're going to be putting ourselves out there and asking citizens of Chicago to take us seriously."