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President-elect Joe Biden is attending church ahead of his inauguration, a traditional step taken ahead of the swearing-in ceremony.

Biden and incoming first lady Jill Biden on Wednesday are attending a service at Washington’s Cathedral of St. Matthew the Apostle. With them are incoming Vice President Kamala Harris and her husband, Douglas Emhoff.

At Biden’s invitation, the first couple is joined by a bipartisan group of members of Congress, including all four top-ranking members of congressional leadership.

That includes both Senate leaders, Republican Mitch McConnell and Democrat Chuck Schumer, as well as House Speaker Nancy Pelosi and House Republican Leader Kevin McCarthy.

Many presidents have chosen St. John’s Episcopal Church, sometimes called “Church of the Presidents,” for the inaugural day service. Biden is the second Catholic U.S. president, and St. Matthew’s is the seat of the Catholic archbishop of Washington.

Biden spent Tuesday night at Blair House, a traditional move ahead of a president’s inauguration.