Kyle Rittenhouse is backing Thomas Massie ahead of Kentucky’s Republican primary on Tuesday, according to multiple reports. Massie is described as an anti-Trump Republican congressman, and Rittenhouse’s public support for him is driving criticism from some pro-Trump voices online. One outlet reports that “MAGA” influencers are reacting negatively to the endorsement, framing it as a betrayal of Trump-aligned interests. Another outlet similarly says Rittenhouse volunteers for Massie, and that the decision sparks anger among MAGA supporters. Both accounts center on the same event: Rittenhouse’s active involvement with Massie’s campaign in a closely watched GOP contest in Kentucky. The reports do not provide details about Rittenhouse’s specific actions beyond the endorsement/volunteering, nor do they describe any responses from Massie or from Rittenhouse addressing the backlash. Overall, the coverage focuses on the political fallout among Trump-aligned segments after Rittenhouse chooses to support an opponent of Trump within the Republican Party.