Michael Guidotti will have his driver’s license on him when he runs the Chicago Marathon, just as he did during every training run since summer. After the Trump administration escalated its immigration crackdown, runners like Guidotti, 31, are worried they could become a target during Sunday’s race. “Just knowing that I come from a Hispanic background and that I am somewhat darker, I feel extra cautious,” said Guidotti. Questions have been swirling for weeks about whether Immigration and Customs Enforcement (ICE) might target the marathon, which attracts thousands of runners globally. Event organizers sent reassurance emails offering a 'Know Your Rights' guide as uncertainty looms. An ICE spokesperson called the rumors of enforcement at the marathon 'ridiculous,' yet many participants still feel uneasy. Enrique Rivera from the Venados Running Club anticipates a muted atmosphere this year, as community members might stay home out of fear. This year’s marathon seems to be marked by an undercurrent of concern, with local leaders worried about the economic impact on businesses due to reduced attendance from both international runners and local supporters.