Ban on foreigners buying homes

[Viral Mehta]

I currently own propeties in Texas and will be returining soon to my home country. I am a non-US citizen and recently have been hearing about Canada banning foreigners from buying property and Texas and other US states considering such regulation. Does anyone know if these regulations only apply on a go-forward basis or can congress pass laws that forces existing home owners who are foreigners to sell their property. I know such an occurence is unlikely and a long way out but was just curious. Also any idea if the Canadian ban is on a go-froward basis or do foreigners who already own homes in Canada need to sell. Thank you for all your valuable insights.