WASHINGTON, D.C. - Pennsylvania’s Northern Tier now officially has a new Member of Congress.

Republican Fred Keller took the oath of office tonight in Washington. House Speaker Nancy Pelosi swore him in shortly after 7p.m. as Keller was surrounded by his family.

Keller, 53, won a special election for Pennsylvania’s 12thCongressional District on May 21. President Donald Trump campaigned for Keller in Montoursville, Pa. the day before the election. He takes over for former Congressman Tom Marino, who resigned in January after winning his re-election bid.

Keller officially begins his first day in the U.S. House on Tuesday.

“It was very special to have my granddaughter holding the Bible,” Keller said following the ceremony. “The Bible that I took the oath on is the Bible that I had with me every time in the Pennsylvania General Assembly. It’s my grandmother’s Bible, and that’s what makes it special to me.”

Keller was formerly a Pennsylvania State Representative, serving Snyder and Union counties in Central Pennsylvania’s 85th Legislative District.