The Berkeley riot did come to mind again when I was reading Seth Lipsky's Thursday column in the New York Post, though.Seth was actually writing about the immigration issue; but along the way he mentioned the Obligation Clauses in the U.S. Constitution.Our Constitution of course lists things the government can do, and things the government can't do. In one section, though, it lists some things the government must do. These are the Obligation Clauses.Here's the entire Section: United States Constitution, Article IV, Section 4, quote:The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened) against domestic Violence.End quote. If what we saw at Berkeley the other day was not "domestic violence," I don't know what it was. Why did the State of California not suppress it; or, if they could not do so, call on the federal government to suppress it, as the Constitution would then require?