There are some politicians on both sides of the aisle that are just far out there. On the left, we have loons like Nancy Pelosi, Harry Reid, Barack Obama, Alan Grayson, Barbara Boxer, Maxine Waters, etc. On the right, we have nutjobs like Sarah Palin, Christine O'Donnell, Michele Bachmann, George W. Bush, etc. Why has extremism became became so popular in our political discourse? Discuss.