Voters will choose the Democratic and Republican candidates to run for office in November and face a ballot-box backlash from voters who want them out.
In Washington, politics matter and party counts, but this voter discontent seems to have nothing to do with party at all--incumbents are the ones at risk.
All eyes will be on four states today: Arkansas, Kentucky, Oregon and Pennsylvania.
That's where Republican-turned Democrat Arlen Specter is barely holding on. His opponent playing up the party switch in campaign ads.
Another factor, the tea party spreading its message across America and now it's hitting the ballot box.
Voters will not go to the polls to cast primary ballots in Virginia until June 8th and when they do they will pick Republican candidates in 5 of the 11 Congressional races.
Many challengers say even if they don't win outright today, if they get enough votes for a runoff that alone will send a message.