I wonder why the Clinton camp hasn’t done more with this:

In a conference call last month with Jewish and Israeli media aimed primarily at dispelling Internet reports he is anti-Israel, Obama stated “Palestinian refugees” belong in their own state and do not have a “literal” right of return to Israel.
But in the 1990s Obama was a speaker at events in Chicago’s large Palestinian immigrant community to raise funds for U.N. camps for the so-called Palestinian refugees.
Ali Abunimah, a Chicago-based Palestinian-American activist and co-founder of Electronic Intifada, a pro-Palestinian online publication, recalls introducing Obama at one such event, a 1999 fundraiser for the Deheisha Palestinian camp in the West Bank.
Abunimah is also a harsh critic of Israel and has protested outside pro-Israel events in the Chicago area.
“I knew Barack Obama for many years as my state senator — when he used to attend events in the Palestinian community in Chicago all the time,” stated Abuminah during an interview last month with Democracy Now!, a nationally syndicated radio and television political program.
“I remember personally introducing [Obama] onstage in 1999, when we had a major community fundraiser for the community center in Deheisha refugee camp in the occupied West Bank. And that’s just one example of how Barack Obama used to be very comfortable speaking up for and being associated with Palestinian rights and opposing the Israeli occupation,” Abunimah said.
According to quotes obtained by Gulf News, Abuniham recalled a 2004 meeting in a Chicago neighborhood while Obama was running for his senate seat. Abunimah quoted Obama telling him “warmly” he was sorry that “I haven’t said more about Palestine right now, but we are in a tough primary race.”

You can read more about this here.