They couldn't refuse Davis, but IIRC there's a specific exemption that's needed for a non-US citizen to compete at nationals and/or qualifying competitions. Technically if USFS really wanted to play hardball they could refuse to give Smolkin this exemption (although I doubt they'd actually do it).The thing is, Diana is a U.S. citizen, right? She was born here. As such, I think USFS has to offer the same support or opportunities, at least publicly, that they would to other U.S. citizen skaters. Yes the whole situation is very complicated, especially in regard to Eteri, but … Diana is a citizen. They can’t refuse her. I don’t think.
ETA: I looked into it: https://www.usfigureskating.org/sys...3Kaf8VOilzIGbzUiRgXzOGuF7irjlbTOuCDMn3lRWKbY=
Here's the form itself: https://www.usfigureskating.org/system/files/2020_CC-01_NonCitizenForm.pdfAll Non-U.S. Citizens who have represented a foreign federation at any level of skating competition must make an application to the chair of the Competitions Committee by submitting a Non-U.S. Citizen Application to Compete (form CC-01) in English