Is Obama a uniter or divider?

When the President was elected he promised to represent and unite all Americans. In his words there was no "red" or "blue" America but the United States of America. What has happened lately? Now you get from his speeches an "us" versus "them" mindset. Class warfare between rich and poor, Democrats vs Republicans, liberals vs conservatives, Tea Party vs every one else. The tone in Washington is worse off now because the POTUS is dividing this country with his rhetoric. This is unpresidential and corrosive to our democracy and country.