Wisconsin Governor Scott Walker is fond of pointing out that he was voted into office based on his promise to take on state employee union collective bargaining rights so that he could get on with balancing the state's budget.
33 out of 100 seats are up for election. 51 are needed for a majority.
|Seats gained or lost||+2||-2|
* Includes two independent senators expected to caucus with the Democrats: Angus King (Maine) and Sen. Bernie Sanders (Vt.).
All 435 seats are up for election. 218 are needed for a majority.