Trump confirms Biden topic in Ukraine call

US President Donald Trump confirmed Sunday that he discussed former vice president Joe Biden and corruption allegations in a phone call with Ukraine's leader, adding to calls by Trump's opponents for his impeachment.

A whistleblower's complaint sparked off accusations that Trump had sought to persuade President Volodymyr Zelensky to investigate a son of Biden, Trump's possible 2020 election challenger -- raising concerns of dangerous foreign meddling in the US election similar to the interference blamed on Russia in 2016.

Trump said that the conversation, held in July, addressed alleged corruption involving Biden and his son Hunter, and he floated the possibility that a transcript could be released.

"We had a very great conversation, very straight, very honest conversation. I hope they can put it out," Trump said, repeating that he had done nothing wrong in the latest scandal to shake his presidency.

The Democratic Party has been split on whether to push for impeachment proceedings against Trump since he came to power in 2017.

But influential congressman Adam Schiff, chairman of the House Intelligence Committee, on Sunday said that his own reservations about impeachment were fading over Trump's Ukraine call.

"I have been very reluctant to go down the path of impeachment (but) the president is pushing us down this road," Schiff said.