Russia probe aide is a proven liar, claims Trump
US President Donald Trump has said a former campaign aide caught up in the Russia probe "has already proven to be a liar".
Mr Trump dismissed George Papadopoulos, who provided key evidence in the first criminal case connecting Mr Trump's team to alleged intermediaries for Russia's government.
The President tweeted: "Few people knew the young, low level volunteer named George, who has already proven to be a liar. Check the Dems!"
Papadopoulos was approached by people claiming ties to Russia and offering "dirt" on Hillary Clinton, court papers say.
Papadopoulos pleaded guilty to lying to FBI agents, the documents added.