@Cycloptichorn,
Totay's WSJ has an article which cited the reported political contributions of the U.S. Chamber of Commerce, Carl Rove's American Crossroads Organization - to the Republicans; and those of the government employees' Union(AFSCME), the SEIU and the NEA - to the Democrats. They were in order;
$75 million & $65 million to the Republicans - $140 million total
$87.5 million, $44 million, and $40 million to the Democrats - $171.5 million total.