Obama Center isn't a traditional presidential library. Critics say it's an activism center.

Don't call it a library.

The $1 billion Obama Presidential Center opened with huge fanfare last week in a park near the shore of Lake Michigan, but critics say what the public thinks is a library will function as the headquarters of Barack Obama’s private foundation, promoting the 44th president's left-wing worldview to future generations.

While every other modern presidential library houses that former commander-in-chief's papers for public viewing, the Obama Presidential Center has no such component.