I alluded to one of them last weekend as per a debate between two contenders in the Democratic primary run-off for the 4th Congressional District. Fox News reports that Rep. Cynthia McKinney is losing her race against Hank Johnson. Four years ago she lost her seat to Denise Majette (who ran for the US Senate in Georgia and lost) and then regained her seat two years later.
Also in Connecticut, Joe Lieberman has lost his primary race to Ned Lamont. Sen Lieberman seemed to have an uphill battle to regaining his nomination and his seat. Lieberman intends to run as a independent in this election to retain his seat.
Update: Joe Lieberman Faces Slim Defeat; Cynthia McKinney Losing In Atlanta