Donald Trump launched a furious all-caps assault on House Democrats Wednesday as Speaker Nancy Pelosi opened debate on the articles of impeachment, accusing them of ‘atrocious lies.’ ‘SUCH ATROCIOUS LIES BY THE RADICAL LEFT, DO NOTHING DEMOCRATS. THIS IS AN ASSAULT ON AMERICA, AND AN ASSAULT ON THE REPUBLICAN PARTY!!!!,’ he wrote on Twitter. Pelosi, meanwhile, said the president gave them no choice but to impeach him, receiving a standing ovation from her Democratic lawmakers in the process. ‘As speaker of the House I solemnly and sadly open the debate on the impeachment of the president of the United States. 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 said in her speech in the well of the House, standing next to a sign with a picture of the American flag and reading ‘to the republic for which it stands.’ Trump set up the impeachment vote in the House as a battle between himself and Pelosi when he sent her a blistering six-page letter on Tuesday filled with personal attacks on the speaker, accusing her of lying when she says she…