Who is "they"? If this isn't a bipartisan issue, that's a travesty and a mockery of our democracy. Another nation interfering in our elections shouldnt be a partisan issue.
> "Another nation interfering in our elections shouldnt be a partisan issue."
When you say "interfering," are you talking about buying ads?
Mueller's investigation has gone far beyond buying ads. But yes,I absolutely think it should be illegal for foreign nations to participate in our political process either through direct means (donations), or indirect (funding political ads), and I consider both interference in our elections.
Do the foreign countries you want to ban from influencing US elections include other western countries like Canada, Britain or Germany? What about Mexico? What if Mexico also bought ads to promote legalizing undocumented immigrants from Mexico? What if the undocumented immigrants themselves bought ads, do they count as foreign or domestic?