From Oil Change International, on a House Committee vote Wednesday on the Keystone pipeline:

“Turns out, those voting for H.R. 3 (and thus, in favor of forcing approval of Keystone XL) today have received on average $141,501 in campaign contributions from Big Oil interests in their political careers. 

….

"The amount received by those against? $12,663 on average.  $141,501 vs. $12,663. Different scales by a full order of magnitude.”