US President Donald Trump's sister, a retired federal judge, called him a liar with "no principles" in audio recordings made public this weekend, the latest attack on the president's character in the run-up to the Nov. 3 election.

Maryanne Trump Barry, 83, also criticised the Republican president for "phoniness" and "cruelty" in interviews that were secretly recorded by her niece Mary Trump during a series of conversations in 2018 and 2019, according to The Washington Post, which obtained the recordings from her...