How was the membership of the House of Representatives affected by the 2010 midterm elections?

The 2010 United States elections were held on Tuesday, November 2, 2010, in the middle of Democratic President Barack Obama's first term. During this midterm election year, all 435 seats in the United States House of Representatives and 37 of the 100 seats in the United States Senate were contested in this election along with 39 state and territorial governorship's, 46 state legislatures (except Louisiana, Mississippi, New Jersey and Virginia), four territorial legislatures and numerous state and local races. Approximately 82.5 million people voted.

It actually went pretty well.