Newly sworn-in Justice Brett Kavanaugh took an active role on his first day on the Supreme Court bench.
FOX's Jared Halpern has more from Washington:
Chief Justice John Roberts welcomed Justice Kavanaugh to the court, wishing him a long and happy career. Kavanaugh's family watched arguments, so did retired Justice Anthony Kennedy.
Kavanaugh asked several questions about 20 minutes into the first hour of arguments; a case dealing with sentences for crimes considered violent.
Outside the court there were protests, along with more than a 100 people who lined up to watch arguments inside.
As the junior most Justice, Kavanaugh's duties include taking notes at a weekly closed-door conference and serving on the court's internal cafeteria committee.
In Washington, Jared Halpern, FOX News.
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