Kyrsten Sinema is sworn in as an Arizona senator with a copy of the constitution in place of the Bible

Kyrsten Sinema chose not to hold the traditional Bible when she was sworn in on Thursday as an American Senator from Arizona. She had in her possession a copy of the Constitution.

A spokeswoman for the Democratic Party's first term said she chose to use a book from the Library of Congress containing the texts of the Arizona and United States Constitutions, reports azcentral.com .

"Kyrsten has always sworn on a Constitution simply because of his love for the Constitution," Sinema spokesman John LaBombard told the local paper.

He did not comment on the senator's religious beliefs. Sinema is the only person in Congress to declare that she is "unaffiliated on a religious level," according to the Pew Research Center on Religion and Public Life.

Sinema, the first American woman from Arizona, holds the book in a video of the sworn reenactment with Vice President Mike Pence.

In the video, Mr. Pence ends by pronouncing the oath of the senator. with the usual words "then, help God?" Sinema replies, "Yes."

She is not the only one to have opted for a different book for the event. More than a dozen books and documents were chosen for the ceremony, according to CNN.