Rep. Ben Ray Lujan (D-N.M.) will be the next chairman of the DCCC for the 2016 cycle.
A CNN report says the NRCC and outside groups used anonymous accounts to share information.
Rep. Jim Costa (D-Calif.) is ahead of farmer Johnny Tacherra (R) by 700 votes.
Democrats have won all 11 House races that were too close to call Nov. 4.
Bera, Costa open small leads in California races.
Martha McSally (R) led Rep. Ron Barber by 161 votes.
Rep. Louise Slaughter (D-N.Y.) defeated Republican Mark Assini by 869 votes.
Rep. Julia Brownley's lead over challenger expanded to 2,370 votes.
Rep.-elect Alma Adams (D-N.C.) will become the 100th woman in the 113th Congress.
Rep. Marcia Fudge (D-Ohio) says low turnout among blacks isn't to blame for midterm losses.