When we asked our followers to send us their TikTok viewing histories, we found distinct differences in political news shown to men and women. A significant gender gap has emerged in this year’s presidential campaign, with women voters breaking for Vice President Kamala Harris and men for former president Donald Trump. For participants in a unique Washington Post experiment, that gap has also shown up in their TikTok feeds. This fall, more than 800 American adults shared their TikTok viewing histories with The Post, opening a rare window on how the increasingly popular app presents political news. The Post found that female users received roughly 11 percent more content about Harris than men did, while men — even liberal ones — were more likely to be shown videos about Trump than women were. The 800 users who responded to The Post overwhelmingly identified as liberal. But the gender gap also showed up in a Post analysis of 300 TikTok users whose histories were collected in a parallel effort by researchers at Cybersecurity for Democracy, a nonpartisan multi-university project that studies algorithms. In that dataset — where liberals, conservatives and moderates were evenly divided — men were 12.5 percent more likely than women to see videos about Trump. The upcoming presidential election was by far the dominant political topic in users’ feeds. But men and women saw different topics: Men appeared to be following the war in Ukraine more closely than women; they also saw far more content than women about taxes and inflation. Women were more likely to see videos about reproductive rights and health care. They also were almost twice as likely as men to see a 2016 video of Trump running mate JD Vance saying “I’m a Never-Trump guy, I never liked him” — remixed by TikTok user @casadimusic to the 2003 hip-hop hit “Freek-a-Leek.” Caption from article by Jeremy B. Merrill, Cristiano Lima-Strong and Caitlin Gilbert - @washingtonpost