That would be the biggest mistake any president could possibly ever make in the history of the country. There are more than two sides to this, please for the love of god people realize that. There are violent protesters AND peaceful protestors AND violent police AND peaceful police. The president would be walking into a virtual unknown as to whom he is standing next to. Just ONE violent protester infiltrating a peaceful protest (infiltrate sounds like a spy act, but it really takes about a 5 minute drive and putting your hands in the air with everyone else), and pop pop pop the president is dead. Regardless of whose side you're on of any issues, if an American citizen takes out the president for any reason, we as a country are done. You think the PATRIOT Act is bad, wait until you see the legislation passed after that incident.