Reps. Jim Costa and Dennis Cardoza, both from California, announced their support for Obama this morning. Cardoza had previously endorsed Clinton.

From Cardoza's statement:

"I am deeply concerned about the contentious primary campaign and controversy surrounding the seating of delegates from Florida and Michigan -- two states Democrats need to win in November. I will not support changing the rules in the fourth quarter of this contest through some convoluted DNC rules committee process. Yet, we must find a resolution to seat the Michigan and Florida delegates so these states' voters are represented at the Convention. I believe we need to avoid this potentially divisive situation by uniting behind one nominee and bringing the party together immediately. Therefore, I have made the decision to support Senator Obama at the Democratic Convention in my role as a super delegate."