At least four Supreme Court justices attended President Donald Trump's first joint Congressional address Tuesday of his second term as president.

The U.S. Constitution doesn't specify how many Supreme Court justices are necessary—and there weren’t always nine on the bench.

Chief Justice John Roberts hates attending presidential addresses, where judicial decorum requires that judges maintain an impartial equanimity amid a partisan free-for-all. "To the extent the State of the Union has degenerated into a political pep rally,