The Heartburn Institute Cherrypicks

Their climate change denier-in-chief picks a particular NOAA study that says that the 2012 U.S. heat wave was mostly natural.

That's true.  He quoted from the study's abstract.

But here's what the study (starting at line 451) says:

"Overall, our results indicate that the extreme magnitude of the March 2012 temperature
 anomalies can be largely explained by natural variability, with an additional contribution from a long-term warming trend of approximately 1C that is likely due mostly to human influences."