Here's an interesting post from Accounting Today regarding how the profession's most prominent political action committees (PAC) spent their money in 2012 and how their preferred candidates turned out.
The biggest accounting PACs backed Gov. Mitt Romney by a 4:1 ratio, but did better at the Senate level with less partisan, more spread-out contributions. Among the winning candidates backed by accounting PACs were Sens. Kirsten Gillibrand (D-N.Y.), Dianne Feinstein (D-Calif.), Debbie Stabenow (D-Mich.), Ben Cardin (D-Md.) Sherrod Brown (D-Ohio) and Jon Tester (D-Mont.) (Tester's race was still in doubt when Accounting Today's article went live, but he has since been declared the winner.)
The article also noted that accounting PACs gave early contributions to Sens. Richard Lugar (R-Ind.), who lost in the primaries, and Olympia Snowe (R-Maine), who later retired.