Democratic presidencies are marked in blue. Carter started the period of modern global warming in 1976, and the hottest year ever (2010) was caused by Obama’s hot air.
Grover Cleveland started the warming of 1893. Franklin Roosevelt also was a big warmer. Clinton was the biggest warmer of all.
By contrast, neither Bush caused any warming. Reagan started things cooling, until the Democrats took control of Congress.
Conclusion : expect fourteen years of cooling as Republicans control Washington.