What are the advantages and disadvantages of using rna or protein as genetic material?

Disadvantage

RNA and proteins are less stable than DNA. In addition RNA and proteins have shorter life spans that DNA

Advantage

This same property can be an advantage because a mutation on DNA can be permanent but one on RNA or proteins will cease after the short life spans of these biomolecules.

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the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.