I'm not sure that few want to admit it. I've seen numerous articles on the topic. To those people, it's the symbolism and the perception that it leaves that not only has the potential to taint his Presidency but also the integrity of the Democratic party going forward.

Bernie Sanders called it "unfortunate" in this clip and "distasteful" in another.

Elizabeth Warren is "troubled" by it according to Fox News . Fox New is smirking about it.

Tucker Carlson debated someone in the democratic party about it.

An opinion piece in New York magazine spoke against it, saying that it leaves doubt in the minds of people, particularly in the democratic party about his motives at the time, and by extension, others in the democratic party

Another article critical of Obama taking the $400K saying that it leave doubt about what could have happened if money weren't involved.

Here's a progressive saying that progressives need to come to terms with it before the party can move on.

Van Jones doesn't think it's distasteful, but says that Obama should do a poverty tour of the country before he does the Wall Street speech.