Mr. President, we have clear evidence that tar sands development causes higher carbon pollution than conventional oil. And we have clear evidence that the Keystone XL tar sands pipeline will drive expansion of the tar sands. Keystone XL gets a failing grade on the presidential climate test.
The president makes a potentially interesting speech on Thursday in Cushing, Oklahoma. It comes amidst a completely unprecedented March heat wave -- 2,000 records fell last week as cities like Chicago broke records dating back to the 19th century.