This is racism. (And also, the World Cross-Country Championships this year are clearly being rigged.)

"According to a report from LetsRun.com, only four of the 18 Ethiopian U20 athletes had their U.S. visa applications accepted"

(That's the national team with the 44-year winning streak. Other countries, including Eritrea, are also excluded due to Trump's racist travel bans.)

https://runningmagazine.ca/the-scene/u-s-denies-entry-to-14-ethiopian-athletes-ahead-of-world-xc-championships/