US president Donald Trump has defended his son's meeting with a Russian lawyer, saying it was standard campaign practice and maintaining "nothing happened" as a result.

US President Donald Trump has addressed the controversy over his eldest son's meeting with a Russian lawyer during last year's presidential campaign.

The chairman of the Senate Judiciary Committee said he is sending a letter to Donald Trump Jr to ask him to testify.

Congressional investigators plan to question the former chairman of the Trump campaign and will subpoena him if necessary, the Senate Judiciary Committee panel's chairman has said.

Donald Trump has sent out an encouraging message to his son, who had a harrowing day after releasing a chain of emails about his meeting with a Russian lawyer.

US President Donald Trump's eldest son was reportedly told that the Kremlin was behind supposedly damaging information he received about Hillary Clinton.

Oh, the irony.

Seldom has overseas investment in an indigenous gem been met with such a collective frisson of excitement as with the confirmation yesterday that Donald Trump had waved his oversized chequebook in the direction of Doonbeg, Co Clare.