Fifteen years after the Oklahoma City bombing, the United States is experiencing an antigovernment climate remarkably similar to the atmosphere that preceded the attack, a Southern Poverty Law Center expert told an audience gathered in Washington, D.C., for a panel discussion and a keynote address by former President Bill Clinton.

The SPLC’s Mark Potok appeared on “Countdown with Keith Olbermann” to discuss the recent wave of vandalism and threats aimed at members of Congress who voted for health care reform legislation.