Speaker Nancy Pelosi says the House of Representatives will file impeachment charges against US President Donald Trump for alleged abuse of power.
“Our democracy is what is at stake, the president leaves us no choice but to act,” the top elected Democrat said.
Mr Trump said Democrats have “gone crazy” and urged them to move quickly if they were going to impeach him.
Democrats hold a majority in the House, making the odds of impeachment passing highly likely.
But there is currently no indication that the Republican-controlled Senate would vote to remove Mr Trump from office.