It means several things. Obama was opposed to the wall which will keep thugs , drug dealers , and illegals out---keeping American's safer , yet has a wall put up around his new home.  Meaning a wall isn't ok for us but ok for him.   Deeper it means Obama did nothing to bring us together and make us safer , so a wall is needed for keeping his own family face and too bad for the rest of us.   Sort of like how the top democrats are all for gun control and would take every gun away if they could---yet surround themselves with armed protection. We shouldn't be able to protect ourselves with guns---but it's ok for them. I hope this helps .