Jan. 6 Panel Faces Difficult Questions as Anniversary of Capitol Riot Approaches

WASHINGTON — The anniversary of the Jan. 6 riot arrives this week with the congressional committee investigating the attack confronting a series of difficult questions, including how forcefully to flex its subpoena power and whether the Supreme Court will stymie a major element of its inquiry.

As the nine-member panel continues to examine the events leading up to the worst attack on Congress in centuries, it is waiting to see whether the Supreme Court will refuse a request from former President Donald J. Trump to block the committee’s access to White House records related to the riot. The committee also has not ruled out moving to subpoena members of Congress, or Mr. Trump and former Vice President Mike Pence.

Thursday will mark a year since a mob of Trump supporters stormed the building, determined to disrupt the formal certification of President Biden’s electoral victory. At least seven people died in connection with the riot, dozens more were injured and hundreds of workers in the Capitol were shaken and traumatized, further fracturing an increasingly partisan Congress.

The committee, aiming to release a final report before the November midterm elections, is planning for a more public stage of its investigation in the coming weeks as lawmakers work to trace the planning of the attack and expand the scope of the investigation. Representative Adam B. Schiff, Democrat of California and a member of the panel, said on Sunday on CBS’s “Face the Nation” that public hearings could begin “in a matter of weeks, if not a couple of months from now.”

But as the inquiry continues, the first anniversary will draw even more attention as lawmakers, staff members, Capitol employees and journalists commemorate the day. Both Mr. Biden and Vice President Kamala Harris are scheduled to give speeches marking the anniversary.

While the House is not scheduled to return for legislative work until Jan. 10, Speaker Nancy Pelosi of California has mapped out events for lawmakers to participate in on Thursday, either in Washington or virtually from their districts, in what she described as “an observance of reflection, remembrance and recommitment.”

The House will hold a moment of silence before Dr. Carla Hayden, the librarian of Congress, moderates a discussion with historians “to establish and preserve the narrative of Jan. 6,” Ms. Pelosi wrote in a letter to her caucus. Lawmakers will give speeches reflecting on the day, and lawmakers will hold an early evening prayer vigil on the center steps of the Capitol.

Unlike the House, the Senate is scheduled to be in session this week as Democrats continue confirming Biden administration nominees and seek to revive their party’s stalled legislative agenda. Senator Chuck Schumer of New York, the majority leader, is expected to invoke the riot and efforts by Trump loyalists to overturn the 2020 election as he pushes to pass a voting rights overhaul and try to change Senate rules to overcome a Republican filibuster against that legislation.

The Senate Rules Committee will hold an oversight hearing with J. Thomas Manger,…