Sen. Hillary Clinton will officially end her campaign for the presidency by the end of the week, multiple sources tell CNN.
A top Clinton fundraiser says it is expected to happen on Friday.
Obama and Clinton were in Washington on Wednesday to each address the influential American Israel Public Affairs Committee. The candidates ran into each other at the AIPAC conference and had a brief chat, Obama spokeswoman Linda Douglass said.
"She's an extraordinary leader of the Democratic Party and has made history alongside me over the last 16 months. I'm very proud to have competed against her," Obama told the Israel lobbying group.
Obama became his party's presumptive nominee Tuesday and will be looking to unite Democrats divided by the long and contentious primary season.
"I am very confident how unified the Democratic Party is going to be to win in November," he said in a Senate hallway Wednesday. iReport.com: Obama/Clinton -- dream team or nightmare?
Some say that putting Clinton on the ticket might fit the bill for uniting Democrats.
Clinton lavished her opponent with praise Tuesday, saying he ran an "extraordinary race" and made politics more palatable for many. Video Watch how the primary played out »
Prominent Clinton backer Rep. Charles Rangel, D-New York, thinks the New York senator could have been "far more generous" during her speech Tuesday night after it was clear that Obama had clinched the Democratic nomination.
Rangel, the senior member of the New York congressional delegation and an early supporter of Clinton's presidential campaign, said Wednesday that Clinton should have been more clear about what her plans are.
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