The historical perspective on the great honor of stopping in the Rotunda on the way to becoming dust is very helpful. Sen. Schumer seemed to confirm the crass political motives interpretation today.
His statement on the Alito nomination is remarkable for its narcissism. His first sentence would be about the demands of the law, the honor of the court, right? Right? Nope. "This morning I went and visited Rosa Parks in the Capitol Rotunda to pay my respects." Schumer then goes on to invoke Parks' memory to score political points against Alito. Dead people can't object to being made objects.