The bipartisanship hit very high levels, until Barack Obama was elected and the Koch brothers and others financed the National Tea Party movement, [which] began in January of ‘09 and coincided with the harsh impact of the Great Recession. The hundreds of millions of dollars spent by the Koch brothers and Exxon Mobil and other large carbon polluters intentionally created a partisan wedge that had at its principal target Barack Obama and his administration. So anyone who’s visible in the climate movement is a target for climate deniers.