(CNN) - Two Senate races remain uncalled Thursday morning – those in Alaska and Washington State – while 10 House seats are still too close to call.
In the Alaska Senate race, CNN has projected that the Democratic candidate will finish in third place, meaning that the winner will be a Republican - either GOP nominee Joe Miller or incumbent write-in candidate Lisa Murkowksi.
In the Washington Senate race, which includes a substantial number of mail-in votes yet to be counted, Democratic incumbent Patty Murray holds a small lead over Republican Dino Rossi.
On the House side, the 10 races yet to be decided include Arizona 7, Arizona 8, California 11, California 20, Illinois 8, Kentucky 6, New York 25, Texas 27, Virginia 11 and Washington 2. All 10 seats are currently held by Democrats.
Not including these undecided House races, Republicans have already gained 60 seats in the House - largest gain for either party since 1948, when the Democrats gained 75 seats to regain control of the House. The last time the Republicans gained at least this many seats was 1938, when they picked up 80 seats in that year's midterm elections.