Care to venture how many death threats President Obama has had?  (Or President Bush, or PE Trump will get)

Considering  the public comments of racist white supremacist, anti government gun activist,  Islamic terrorist that have been attacked by Presidential command and social media sites that encourage the use of dehumanizing and degrading insults that encourage unstable persons to make themselves a 'hero of the people'. a wall around an exposed urban household seems  a reasonable start for protection.   

It was likely requested by the Secret Service but you know that don't you? http://money.cnn.com/2016/11/21/news/protecting-donald-trump/index.html