Biden assured Zelensky during a visit to Washington that strong US support for his war to repel Russian invaders would be maintained despite opposition from some Republican lawmakers.

The hearing is not expected to reveal new information about Biden's financial ties to his troubled son who pursued a range of international business ventures while struggling with drug and alcohol addiction.

Meeting for the first time since Netanyahu returned to power in December, both leaders signalled a desire to ease strains in their relationship, but Biden also made clear he was determined to discuss their differences.

Biden defeated former president Donald Trump in the 2020 election and may face him again next year; Trump is the frontrunner for the 2024 Republican presidential nomination.

The inquiry is centred around whether Biden benefited from Hunter Biden's business dealings.

The lawsuit accuses Garrett Ziegler, a former aide to Trump trade adviser Peter Navarro, of violating California's computer fraud and data access laws, and demands a jury trial.

Trump was booked at an Atlanta jail on more than a dozen felony charges as part of a criminal case arising from the former US president's attempts to overturn his 2020 election defeat in the state of Georgia.

Biden's remarks were reminiscent of comments he made at another fundraiser in June when he referred to President Xi Jinping as a 'dictator.'

Several Asean diplomats say it will be a significant disappointment if Biden did not go to Jakarta, given the public emphasis his administration puts on the importance of ties with the region.

Biden offered a cautious assessment of unfolding events in an attempt to avoid inflaming tensions with nuclear-armed Russia while he offered firm support for Ukraine in its bid to turn back Russian invaders.

According to court filings, Hunter Biden received taxable income in excess of US$1.5 million in 2017 and 2018, but he did not pay income tax those years despite owing in excess of US$100,000.

Negotiators for President Biden and Republican Kevin McCarthy reconvened at the White House to try to strike a deal to raise the US' US$31.4 trillion debt ceiling and avoid a catastrophic default.