Kerry helped launch President Obama's political career by having him deliver the keynote address at the 2004 DNC. (Creative Commons)

For various reasons such as other pending Cabinet decisions and the nation in mourning after the school massacre in Connecticut, the White House will wait a few more days to make an official announcement.

The withdrawal of Susan Rice from consideration opened the door for Kerry, who has had a prominent role in Obama's political career. While running for president in 2004, the Massachusetts senator picked Obama, then an Illinois legislator, to give the keynote address at the Democratic Convention that propelled him to stardom.

Secretary of State Hillary Clinton, who is recovering from a concussion she suffered after fainting, is expected to retire in the next few weeks.

Read the full story at ABC News.

Reach Executive Producer Danny Lee here; follow him here.