Days after he easily won reelection to Congress, U.S. Rep. Jesus “Chuy” Garcia announced on Thursday that he will join an already crowded field of candidates hoping to unseat Chicago Mayor Lori Lightfoot as she runs for a second term.Garcia, who has for years made known his desire to lead Chicago and who in 2015 ran unsuccessfully against Mayor Rahm Emanuel in the city’s first runoff election, instantly becomes one of the leading contenders thanks to his popularity as a congressman and a history that …