Smithsonian leader Lonnie Bunch III is navigating political pressure from the Trump administration while curating a 250th anniversary exhibition.

In a rare interview, Bunch says the White House has not requested any changes, new documents or inputs since the Smithsonian turned over documents the administration requested for a review.

A new exhibition aims to give a sense of America's struggles and aspirations. Items on display include Thomas Jefferson's desk, the first nugget found in the California gold rush and MLK's handwritten "I Have a Dream" draft, among others.

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For over a year, Lonnie Bunch III, the head of the storied Smithsonian Institution, has been at the center of a political tempest.