The former Trump campaign aide whose Russia contacts set off the investigation over collusion in the 2016 US president election...

A former advisor to US President Donald Trump whose contacts with Russians set off the investigation into possible collusion with Moscow was jailed Friday for lying to the FBI.

A Trump campaign aide has pleaded guilty to lying to FBI investigators probing the campaign's possible links to Russian interference in the 2016 presidential election, according to court documents unsealed Monday.