Nancy Pelosi — flanked by a poster image of an American flag and placing her right hand over her heart — recited the Pledge of Allegiance at the start of her opening remarks during impeachment proceedings against President Trump.

“Let us recall what that pledge says,” she said before reciting it.

“No member regardless of party or politics comes to Congress to impeach a president, but every one of us as our first act as a member of Congress stood on this historic House floor before our beautiful American flag and raised our hands in this sacred oath,” the House speaker said.

“I do solemnly swear that I will support and defend the Constitution of the United States against all enemies, foreign and domestic, so help me God,” she said as the image of a waving flag stood on an easel nearby with the words “To the Republic for Which it Stands.”

The Founding Fathers created a republic starting with the “sacred” words “We the people,” she said.

“But very sadly now, our Founders’ vision of a republic is under threat from actions from the White House. If we do not act now, we would be derelict in our duty. It is tragic that the president’s reckless actions make impeachment necessary. He gave us no choice,” she continued.

During Trump’s July 25 call with Ukrainian President Volodymyr Zelensky — which sparked the impeachment proceedings — he asked Zelensky to announce investigations into Joe Biden, his son Hunter and the 2016 election.

The administration at the time was withholding a White House visit for Zelensky, as well as $391 million in military aid the country wanted to fight Russian-backed separatists in the country’s east.

The aid was eventually released on Sept. 11 after members of Congress questioned the delay.

But Pelosi labeled Trump’s call and subsequent denial of requests for documents and witnesses legitimate grounds for impeachment.

“The president used the power of his public office to obtain an improper personal political benefit at the expense of America’s national security. When a president weakens a democratic ally that is advancing American security interests by fighting an American adversary,” she said, referring to Russia.

“The president weakens America. This abuse of power also jeopardizes the integrity of our elections.”

The expected House vote to impeach would set the stage for a trial expected next month in the Senate on whether to convict Trump and remove him from office.

While the House twice previously has voted to impeach presidents — Bill Clinton in 1998 and Andrew Johnson in 1868 — no president has ever been removed from office via impeachment.

The GOP-led Senate is controlled by Trump’s fellow Republicans, who have shown zero interest in ousting him.

The president adamantly denies wrongdoing.