I hope he does get involved. That would be the death knell for the UK to stay in the EU. They know how much Obama detests them, so him wading into the referendum will have a similar result to him wading into the Israeli election...meaning that whatever he’s against will happen!
The only thing I have to say to the Brits is that we’ve been putting up with this bullsh*t for the past 7+ years so imagine how we must feel.