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- Clarence Thomas didn't disclose a 2010 trip on billionaire Harlan Crow's jet, a Democratic senator alleged.
- The allegations are part of a Senate investigation into Crow's taxes and financial ties to Thomas.
- One week ago, Biden proposed huge changes at the Supreme Court, including a binding code of conduct.
Supreme Court Justice Clarence Thomas missed publicly disclosing another jaunt on billionaire and conservative megadonor Harlan Crow's private jet, Democratic Sen. Ron Wyden of Oregon alleged in a letter on Monday.