America has de facto exile due to the No Fly List:
https://www.theguardian.com/commentisfree/cifamerica/2010/ju... https://www.aljazeera.com/indepth/opinion/2013/02/2013241659...
https://www.thedailybeast.com/one-womans-case-proves-its-bas... https://www.courthousenews.com/en-banc-9th-circuit-takes-up-... https://foreignpolicy.com/2018/05/01/who-can-challenge-the-n...
Snowden is arguably in exile, as his passport was cancelled, but he wouldn't be refused entry :-)