(CNN) -- Sens. Barack Obama and Hillary Clinton team up again Wednesday, but not all Clinton's supporters are jumping on the Obama bandwagon despite her calls for unity.
Two fundraisers are scheduled Wednesday in New York and a third on Thursday, making it five times the two have appeared together since Clinton ended her quest for the Democratic presidential nomination last month.

Two of the events are aimed at raising money for Obama's campaign, and one is to help Clinton retire the debt from her failed run.

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But for some of Clinton's top supporters, it's going to take more than just encouragement from the former first lady to get them to open their wallets and hearts to Obama.
Some of Clinton's fundraisers are pressuring the Obama campaign to support her policy positions -- and help pay off her campaign debt.

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Clinton was more than $22 million in the red when she bowed out last month, and half of it was personal loans she made to the campaign to keeping it running.
With that debt yet to be paid off, some of Clinton's supporters are balking at the idea of forking over donations for Obama -- especially if he does not choose her to be his running mate.

Businesswoman Lynn Forester de Rothschild launched a Web site bringing Clinton supporters together to put the pressure on Obama.
"We are being asked to embrace party unity without the fair representation of Hillary Clinton and her 18 million voters," she says on her Web site. "Party unity requires bilateral action. We ask Barack Obama and the to respond."
De Rothschild is one of the so-called "Hillraisers" -- supporters who raised at least $100,000 for Clinton. She's yet to fork over any cash for Obama, and she doesn't know if she will.

"I certainly know there are lots of people who are withholding their money," she said.

"This is a hard decision for me personally because frankly I don't like him. I feel like he is an elitist. I feel like he has not given me reason to trust him."

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Rep. Debbie Wasserman Schultz, D-Florida, spent two days in New York this week with disaffected Clinton supporters.

"It's not unexpected that they wouldn't just automatically shift over to Obama, because they're not the typical Democratic supporters that just automatically shift over," she said. "They need to be wooed. They need to be won over."

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