George Papadopoulos claims he personally met with President Donald Trump in an introductory meeting that the White House has not acknowledged and was authorized to represent the president abroad.
Miller had not previously been identified in documents related to the investigation by special prosecutor Robert Mueller.
Accusations between Democrats and Republicans come a week after special counsel Robert Mueller moved forward with charges against Trump campaign members.
Republican lawmaker says Mueller "must step down immediately” because of ties to the Obama administration.
Among those who felt President Donald Trump likely committed a crime, 19 percent believed there was solid evidence
The Trump campaign probably should have called more references.
Anonymous Wikipedia changes from the Congress computer network hit Robert Mueller and George Papadopoulos' pages.
Papadopoulos, a former foreign policy adviser to Trump, has pleaded guilty to lying to federal agents, the special counsel’s office announced Monday.
"I do not want to see my name associated with indictments and crimes ever!" Meet the other George Papadopoulos, a random financial planner from Michigan.
The special counsel’s investigation won’t be over soon, as the White House claims.
George Papadopoulos, a young foreign policy adviser to Trump's campaign, suggested the candidate meet with Russian leaders, The Washington Post reported on Monday evening.