Not so much different from Russia. Why can't they leave the UK to have its election without them interfering?
"Ms Weyand’s remarks are the third intervention in the election campaign so far by senior EU figures... Brexit Secretary Steve Barclay attacked Mr Tusk on Sunday for showing “a total disregard for democracy.
Mr Barclay added: “This interference in our domestic election campaign shows where the EU elites’ real sympathies lie: with a Corbyn government which would renegotiate a deal and then campaign against it in another referendum”."
http://www.thesun.co.uk/news/brexit/10372646/eu-trade-boss-bare-bones-brexit/