Rep. Nancy Pelosi Nancy PelosiPowell warns failure to reach COVID-19 deal could 'scar and damage' economy Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.), who is expected to be elected Speaker on Thursday, said in an interview published Thursday that President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE will face a "different world" with stiffer oversight as Democrats take over the majority in the House.

“He was used to serving with a Republican Congress, House and Senate that was a rubber stamp to him. That won't be the case,” Pelosi told USA Today. "Oversight of government by the Congress is our responsibility."

Pelosi and other Democrats have laid out a host of areas where they intend to conduct oversight or investigations. Top Democrats have in recent months said they plan to look into the president's finances, his daughter Ivanka's use of private email and his foreign policy decisions.

ADVERTISEMENT

Pelosi told USA Today that she does not intend to seek grounds for impeachment unless it's "clearly bipartisan."

“The facts will indicate a path and I don't think we should impeach a president for any political reason, but I don't think we can ignore any behavior that requires attention and that was all based on the facts," Pelosi told USA Today.

The California Democrat, who in 2007 became the first woman ever elected Speaker, is set to return to the top-ranking position in the House on Thursday when the new Congress is sworn in.

Pelosi, 78, is set to join former Reps. Henry Clay (Ky.) and Sam Rayburn (D-Texas) among lawmakers to serve nonconsecutive terms as Speaker. She won over the support of a number of Democrats late last year who had indicated they opposed her as Speaker.