The 22 Republican senators who sent a letter to President Donald Trump last week urging the United States' withdrawal from the Paris climate agreement received more than $10 million dollars in campaign funds from fossil fuel interests.
The two-page letter was signed by a number of Republican heavyweights from coal/gas/oil-rich states, including Senate Majority Leader Mitch McConnell of Kentucky, Jim Inhofe of Oklahoma and Ted Cruz of Texas.
The Guardian calculated that the 22 senators received a total of $10,694,284 from oil, gas and coal money in just five years. (See the breakdown below.)
However, that sum does not even come close to the amount of undisclosed funds coming from the deep pockets of Charles and David Koch's coal, oil and gas conglomerate, Koch Industries, and other outside groups.

Linked here.